This is not an unreasonable ask though. You should certainly think twice to pigeon holing yourself with any technology that you do not have full rights to and will be lost without a specific provider.

It does make figuring out your business model more complicated, but having SOME story for what will happen if you go out of business or start being a bad actor is something you need to figure out.

It isn't impossible though, our SAAS is Open Source and we survive, though yes, some customers do choose to self host. You just end up with fewer enterprise customers and more smaller clients.