So first Allegorithmic ditches the 'rent to buy' scheme which I loved, and now you've sold your soul to the devil of CG, Adobe. I won't be signing up for a subscription, so when you stop my copy of Painter working, I guess I'll be done with Substance, which is real shame.
Also, it makes me wonder about the legality of simply stopping a license for a product I've bought and paid for. I hope you honour the perpetual licenses I have and not let Adobe bully me into a subscription, which, of course, I will not take.
This is all terribly bad news for users (especially the little guys, like me). But well done for cashing in, and I hope you enjoy the proceeds from your Adobe shares.