Maybe something more is at play here than just the founders and team cutting access to years of their work.

Could also be something to do with a certain company who doesn't like you to have access to (certain) assets of their acquisition after it went through. I mean, they did the same thing with TestFlight. janking Android support directly after the acquisition (and closing it altogether a while later) and Logic (yanking Windows support directly after the acquisition and making the product OSX exclusive).

You could say Apple really is quite ruthless and basically acts like a asshole when it comes to acquisitions, even though their CEO seems to be quite a nice and gentle person (at least after work hours)