That change is nice enough, but now there's no way to view past jams we've submitted a game to at all...
A couple of days ago I requested this instead: https://github.com/itchio/itch.io/issues/867
But maybe jams we've participated in could get its own section on top of https://itch.io/jams/past, just like how jams we're currently enrolled in are displayed separately on top of https://itch.io/jams? Would that be a nice compromise?
Edit: I just found out that I can see jams I've submitted games to in the dashboard: https://itch.io/dashboard/jams – Since I don't care about jams I've joined but not submitted to, this is enough for me!