Knowing there are still people that might never change from Switch to Switch 2 (even in 8 years) and that there will be more competition than with the Switch (new microsoft handheld, new playstation handlheld in works).
But on the plus side, the jump from Switch 2 seems massive and it will definitely receive more support from third party and will be closer to the competition than Switch was. I feel like the first party library for Switch 2 will be bigger with the newfound confidence and bigger teams they have invested during Switch 1. Also franchises that came back to life on Switch will maybe comeback faster on Switch 2 cause they know now they have the potential. Switch was ports heavy because of the failure of the Wii U and i feel like with Switch 2, they will need to get out of beaten path more.
So in summary, i feel like it could still beat the PS4, but not be able to compete with the Switch with some context factors like the pandemic that pushed it to higher. But at the same time i feel like if Switch 2 can compete with PS5 and Xbox enough, knowing those are having issues figure out their first party output, it might blow up bigger than i anticipate.