Not impossible though, I run a directory of open-source alternatives and rarely do you see what Cal.com did. Projects gets abandoned yes, but a pure bait and switch like this really grinds my gears. This is from someone who is self hosting Cal.com right now and now they are going to strip even more features.
Their docs say cal.fyi won’t have team features but my self hosted one does. They are a bit hacky. I think they also said they will stop publishing a docker image and that’s what I use to self host. I think I might just build an alternative over the weekend.