Studios like Panic Button, Virtuos, Saber, etc are gonna be in a new golden age with the release of Switch 2, they'll be so many games to port they'll never have to worry about their next gig.

While I agree with most of this, I wouldn't say support for Switch 1 "barely picked up", if you compare 2017 to 2019-2022 the difference is huge.

It will be a lot better than switch, but it will not be perfect

Much better than the start of Switch generation but mostly the same as it is now; they obviously won't be lazy and hesitant to jump on board like they were last time, but they still know it won't be the main platform for the big 'AAA blockbuster' blah blah titles, so most of the ports will still be half-assed efforts with as many corners cut as they can get away with.

Hopefully Nintendo will have even more exclusive or semi-exclusive deals done specifically for the system, since at least those should be well optimised.

It'll be significantly better than Switch 1, especially in the beginning with 3rd parties on board right from the jump as opposed to the "wait and see" approach they had with early Switch 1 years from 2017-2019.

Basically, it'll get all of Switch 1's support right from the start + a handful of AAA, major titles that you see on PS5/XSXS. I'd even go as far as to say you'll see some of them released on the same day as the other versions and run and look better on Switch 2 than those PS4/XBO ports ran and looked on Switch 1.

With that said, the 3rd party support for Switch 2 will still take a backseat/not be as much of a priority for 3rd party devs as their support for PS, PC, and even Xbox - Even though Xbox sells around 1/3rd of the units that Switch 1 sells.
And the reason for that is simple: On PlayStation, Xbox, and PC - Third Party games will sell the best or get the most spotlight. Especially on Xbox and PC. And will even sell more than most, if not all, of PlayStation's 1st party games with the exception of Spider-Man and maybe God of War or Gran Tursimo. Or hell depending on the game (Grand Theft Auto and Call of Duty, for example) It'll outsell even those. You look at the best-selling software titles on PS4 and Xbox One and the vast majority of the Top 10-15-20-30 titles are 3rd party games. And I'd imagine it's the same case with the PS5 and Xbox Series.

But on the Switch? You have to go all the way down to #24 (Stardew Valley) and #25 (Monster Hunter Rise) to find 3rd party games. The rest of the Top 30 are all 1st party Nintendo titles. Third parties will always be second, third, fourth, fifth, and sixth fiddle behind Nintendo's 1st party games. You will NEVER see a 3rd party game outselling Mario Kart, 3D Mario, 2D Mario, Mario Party, Open-World Zelda, Pokemon, Animal Crossing, Splatoon, or Smash Bros on a Nintendo system. And some will have a tough time outselling even Kirby, Donkey Kong, or Fire Emblem.

For that reason, no matter how successful Switch 2 is - Hell, it could even outsell Switch 1. And I've no doubt its 3rd party support will be better than Switch 1. Third party devs and publishers will never prioritize it over PlayStation, Xbox, and PC, because they know their games will always take a backseat to Nintendo's own lineup.

If its sales are close to those of Switch 1, then it's probably similar and might be better. When Switch 1 launched, most game engines were not as scalable as they are now. Switch 2, with the benefit of DLSS, helps developers even more. Switch 2 is in a better position hardware-wise in 2025 than Switch was in 2017.

As far as I can tell about 95% of PS5 games are also available on PS4. It seems reasonable that most of these PS4 games should also come to Switch 2.

A lot better. Microsoft is basically going third party right now and Sony has more or less given up on Japan. Most games released today still run on PS4, Xbox One and Series S, Steam Deck... so Switch 2 will be able to play all these games. If publishers are clever, they will release their games on Switch 2. There is simply no reason not to release titles on the console.

If third party Switch 2 games look good enough Switch 2 will be by far the most attractive dedicated gaming platform on the planet, as it'll be the only platform with a large number of actual exclusive titles.

Depends first on if the Switch 2 is powerful enough. Then it's up to Nintendo's willingness to attract them. If either of those things don't happen, you won't see anything more than you saw with the first Switch. Developers need the right hardware, but they also need confidence in the hardware manufacture, resources, communication etc.

That's true.

That and publishers were nervous about Switch. 3DS may have been a success, but the launch and especially months after before the price cut was rough. Wii U was a failure, so that really turned off publishers. 

Much better than Switch 1 in the first years. For start it's going to run EVERY major PS4 games, and a good number of PS5 games that were also cross gen with PS4. We are likely to see games like Elden Ring, Final Fantasy XVI, Resident Evil 4 remake, etc all on Switch 2, albeit at lower settings and 30 FPS. I think it will miss some third parties like Cyberpunk and Baldurs Gate 3. I'm sure there will be no GTA VI either

On its mid-life, I think it will miss the AAA games that will start being released in 2 or 3 years, which is when games will start to target PS6 specs and Switch 2 will no longer be able to handle them. Third parties that don't target high specs consoles will still be there, specially japanese developers like Capcom, Square and Sega