Yes, switching from dedicated recorder to computer will take some getting used to. But if you do, carefully consider the OS and DAW you want to work with. IMO, Windows is a much better long-term solution for consistency than Mac. I'm operating my Windows/Cubase studio since 2010 with no change in hardware whatsoever, and everything that worked under Windows 7 when I started still works under Windows 10. And will continue to do so for a long time.
OTOH, bottom line: whichever computer solution you chose, if you dedicate it to recording and treat it as such it is no different than any standalone recorder (which is a dedicated computer anyway). Noone forces you to update anything, just keep it disconnected from any network and your good to go for decades.