With the exception of a few server and app module environments (such as adobe extensions), since nearly every browser is auto-updating, I tend not to support anything more than a year old for browsers... Phones are a little niggly, but even Android has separated chrome updates from android.. and Apple does updates for even fairly old devices.
For me, I use ES2020 features without much fear. Just my own $.02 at this point. Anyone that would disable updates is a security risk, and I'm fine with them not being able to use the applications I work on at this point.