Because the promise creates internet hype. The delivery they don’t care about since people already drank the coolade.
As a brilliant example you can try to read the brown nosing comments on just about any youtube video they publish.
Most comments can be fixed by adding “at making stuff that doesnt work” to it…
Re going back to .25…
You have to start from 0 or just about, but most things you can export out of the engine, inclusing landscape paint layers, and then re-import elsewhere.
Still, depending on what the project is, one may wish to look for an engine that isn’t in such a bad condition - and being managed by people who absolutely do not care about the end user…
CryEngine is decent at this, but then again even Unity is better at it, and that’s saying a lot…