It's not pointless at all, I wasn't talking about sending a political message but about harsh reality. If MacOS closes down, I will simply be unable to support

It's not pointless at all, I wasn't talking about sending a political message but about harsh reality. If MacOS closes down, I will simply be unable to support Mac users of my apps and have no transition path for them. I have good export options in my application, and that's about all I can do. As for the rest of your post, I don't get it. To close their ecosystem Apple only has take away the option to make Gatekeeper exceptions for unsigned apps and the option to switch off Gatekeeper. I wasn't talking about anti-jailbreaking protections, it suffices that you'd have to hack the OS and violate the EULA in order to run unsigned apps. Whether that happens or not I don't know. So far, the path has been down that road. (Just look at the gradual changes in Gatekeeper, introduction of sandboxing, unification of iOS and MacOs, etc.)