LOL. No cost. You take as much pain as you want (hopefully no pain). The purpose of the beta is to find issues and report them. You live with the bugs if you can, but you are not stuck. You can roll back to the old versions on the apps if you’re not able to work effectively. I had to do so myself after I reported a few bugs, because ultimately I couldn’t get what I needed done, but I’ll be right back for the next version to give it a shot and report anything I see. Hopefully the kinks I had issue with will be resolved enough that I can stay on the app full time. It’s possible even that some of the issues I saw were taken care of with some “server side” changes in the meantime, but I haven’t had the time to investigate again.
On the web it’ll be easier since they have a separate link. You can try it and if things aren’t working well for you, or you’re not in a mood to see any bug you can just go to the old link. easy peasy.