I asked this question some time ago, and the answer was that even much older version than yours continue to work at the moment, but it is a very good idea to keep up to date.
It’s usually posted by someone on Twitter also…
But afaik, the client itself is also supposed to check for when new versions are available, and pop up a message on the screen. But I. Not sure when this was introduced and how often it actually checks
I’ve been running most of the Alpha’s, all the RC’s except for 5 which had a bug, and am currently running RC6, which is as good as 2.0.0. Just haven’t had time to install 2.0.0 yet. As have countless others on Discord.