Their ToS did say that updates would only apply to the current major version and newer of Unity when the updated ToS was released, but they removed that clause without telling anyone about a year ago and are claiming their changes are retroactive, so that can’t even be trusted. At this point, I can’t see any game dev beginning work on a new Unity project ever again without some kind of ironclad guarantee that this would never happen again. My prediction is we’ll see maybe 1 or 2 years of games released on Unity, just from the ones that were already too far into development to start over on something else, and then Unity is done for good.