According to T144457: Invite users to opt in to the RC Filters beta from the RC page, and educate them about its features, the popover should be permanently dismissed after a user sees it.
Can be solved with UserResetAllOptions hook, and copying old preference.
This is a little magic and potentially unintuitive to the user. Do we actually want to preserve this setting? Also, should there be a more general solution to this for certain kinds of preferences?
I agree there should definitely be a more general solution for unresettable preferences.
So, reading this more carefully (and having tried it out), I now see that you only get the invitation again if you delete all your preferences—i.e., you don't get it if you just uncheck the New Filters beta. Given that, it doesn't seem so bad. We could maybe fix it one day, but I'm moving this off the Q1 board to Triage>Medium term.