It’s just a way of classifying the age of consoles. Basically what Vertemes means is that the Switch is not up to the same standard as a PS5 or Xbox Series X. Hell, the Switch is outperformed by the PS4. But I don’t think most people are playing the Switch based on it’s performance anyway. The Switch doesn’t even support 4K resolution on a screen like the other consoles can.
I don’t know much about game development but I think one of the big issues is that the older a console gets, the harder it becomes to develop games that run well on that console. Especially for games that come out on multiple platforms.
Here is a quick example I found of MotoGP 24 being played on a Switch compared to a PS5
In some cases, like the PS4 Pro which was an upgrade to the PS4, some minor enhancements were made that improved gameplay. I think for the Switch it needs more than some minor enhancements to have modern games run well on it. The enhancements it would need would probably mean that the console itself needs to change more to be able to handle the increase in heat produced by the upgraded equipment.
This is definitely possible but I want to remain optimistic that it will function similar to the 3DS. The 3DS is able to play both 3DS and DS games using the same game slot. I think that you’ll still be able to use your Switch for a while before needing to upgrade
Sorry for the long winded response, I just drank my morning coffee