Continuing work on old (9.0.20, 7.5) projects in 9.5?

Would anyone change over on an existing old project to start working in 9.5, or is that tempting fate/courting disaster too much?

I’ve just opened a bunch of old/ongoing projects and all seems fine so far… from personal experience i’d finish existing projects with the version you’re currently running them in… obviously though ymmv.