Honestly, one thing I’m seeing frequently in comments about this is a bit frustrating. That is, people saying that they vow never to buy any games in Unity ever again on principle.
Vendor lock-in is a real thing, and part of the reason they actually tried this play. Many of these developers likely want to switch to a different engine, but don’t have the time or resources to do so. Honestly of all people hit by this situation, they probably need the help most.
Incidentally, if you are one of those devs reading this and feel you don’t know anything other than Unity, go learn something else. Diversify your portfolio. Learning a new engine isn’t hard if you know the fundamentals.