I'd rather have fast RAM than slow RAM. When people overclock the Switch (tons of videos of this on Youtube) overclocking the RAM creates better performance uptick than overclocking even the GPU in many cases. Higher bandwidth also probably tells you that Nintendo is planning to use the full capability of the chip, otherwise there'd be no point in the bandwidth so that's a good sign also.
12GB LPDDR5X is quite pricey even today, ROG Ally and Steam Deck use cheaper regular (but slower) LPDDR5. LPDDR5X currently really is only in high end premium flagship phones/tablets like the $1050 Google Pixel 8 Pro (exact same 12GB LPDDR5X RAM + exact same 256GB UFS 3.1 storage) and the new iPad Pro OLEDs that just released this week and those even only have 8GB of LPDDR5X for $1000+.
The XBox Series S only has 8GB of RAM for games, 12GB is comfortably ahead of that in size, so I don't see the issue.
You're getting more RAM in the Switch 2 than a $1000 iPad and more RAM than the XBox Series S, which is a legit next gen home console, at the best speed available in mobile RAM currently. I'd say if you're complaining about that, you're just looking to complain about anything, that's a very good hardware design decision, the reaction to this news on the internet has been largely very positive.
Nintendo is in the business of selling 120+ million pieces of hardware they're not going to make a $700 niche console like the Lenovo Legion Go or whatever, you have to be realistic. This is still way, way, way, waaaaay better than the Wii/DS/3DS/Wii U era, this is much more in line with the GameCube/N64/SNES days where Nintendo provided fairly good hardware but still at a mass market price. And even this I think is going to push that envelope a bit because I think this is going to cost $450, which is way cheaper than like a $700 ROG Ally, but it's not exactly dirt cheap either.
