This lady did a 3D print out based on the leaked CAD/Blender files and leaked dimensions (those have been out there a while), but just for illustrative purposes, it makes a regular Switch OLED look tiny. She's not a reliable tech person, but the first couple of minutes are worth a watch just to see how it compares size wise to the current Switch.  

Curious what the 3rd button is below the home button.

But the problem is that the Nintendo switch 2 must be able to switch from dock to undocked, even in the middle of game session, instantly.
Dock having any storage would break the concept.
I think we wont have a solution. Even the new SD cards are limited to around 800~900 mb/s. Would developers limit the games due to these speed?
And even if it accepts it, you wouldnt be able to use your switch 2 games on you regular SD card. It is tricky.

If devs plan to use all the 2.1Gb/s, it will only be able to load from SSD, so I think the only solution would be to limit the game sizes (64gb maybe), and reserve this space on the SSD to the current games. Open a new game that is not on SSD would delete whichever has on the 64Gb it and load it to this space. So, i think opening a SD card game (at least the minimum amount to allow to open the game) can be potentially a rather long process.

I don't think SD card speeds are much of an issue - PC games work perfectly fine on standard SSD drives, which are limited to ~550MB/s. Anything that is not HDD is fine for now.

The reason why HDD's suck has much less to do with bandwidth/throughput and more to do with latency.

I have a 4 TB external SATA SSD that benchmarks about 350 MBps reads, and it plays modern games fine on PC. Load times are slightly slower than using the internal NVME drives, but not noticeably so.

Hmm, maybe. There are a bunch of next gen microSD solutions out there. I don't  *think* nintendo will pull a vita since they saw how *that* crash and burn, for one.

The bigger question is will games run straight out the cart, and if it does, how fast is the cart speeds. If the new carts go around 1Gb/s then the newer high speed 800mb/s cards would do fine.

I don't think that running games from SD cards will be a problem at all. I'm gaming a lot on my Legion Go and Steam Deck and put a lot of games on SD card. I didn't encounter any problems with that, even with more demanding games like RDR2, Horizon: Forbidden West or something. Not even the loading times are an issue. So I really don't see why Switch 2 games should be a problem, especially since I don't think the console will be significantly more powerful than the Legion Go. Maybe even a little weaker to get better battery life and a smaller form factor.

Well, HDDs are slower, no way around it, even in sequential large file reads/writes. But that's bearable. Where they really suck is small files, that's where they really fall of the cliff in performance.

Descent SD cards will be more than enough.

Just for completeness, LPDDR5-7500 has a bandwidth of 60GB/s, meaning that in dual-channel it would reach 120GB/s. This would be quite a jump over the Switch, as that one has LPDDR3/4-1600 (OG Switch had LPDDR3, models from 2019 and later have LPDDR4 with the same speed), resulting in a paltry 25.6GB/s

SD Express is from June 2018 and thus is almost as old as the Switch itself, and yet I haven't ever seen any SD card with that standard. In fact, I haven't seen any from the previous standard, UHS III, either yet. UHS II cards that make full use of the bus are already very expensive, clocking in at $100+ for an 128GB card, so I'm not sure I even want to see what UHS III or even SD Express cards would cost. 

If Nintendo really wants to use some existing memory card, they should rather opt for CFexpress. Like SD Express they use PCIe 3.0 or 4.0 for the data transfer, but while SD express is limited to 1 (7.0 specification) or 2 lanes (9.0 and newer), CFexpress uses up to 4 lanes, though then the card is physically about twice the size of an SD card. The most common CFexpress cards are type B (2 PCIe lanes) and slightly larger than SD cards, meaning they are much larger than the microSD cards used in the Switch - but I doubt any microSD card has enough physical space to put enough lanes for fast transfer speeds on it's back.

CFexpress also comes in many sizes, from the more humble 128GB with 1.6GB/s to cards like this 1.6TB card with 3.5GB/s read speed (seriously with this size and speed, you could use that one like a hot-swappable SSD in a PC), giving them enough storage space for a handheld console and a wider price range. They're not exactly cheap, but I don't think SD Express will be any cheaper.

But I was told it could not exceed 111GB lol. I kept saying 120 was what was listed. 95GB jump aint too shabby.