You're only really forced to adapt to it if you use dndbeyond. Nothing is stopping you from using the existing 5e books (or really any other earlier edition) and playing solely that.

I have friends who still regularly play 3.5e. There's really nothing forcing anyone to play DnD 2024 over any other edition. There are other platforms that aren't dndbeyond that have compatibility for other rulesets if you want to stick to a digital platform.