I don’t think the version numbers declaration will work in my use case. I stay on the latest discourse code, upgrading every couple of days. Continuous deployment is great. No Big Bang changes. And version numbers are largely meaningless.
I wouldn’t expect all plugin developers to manually test against every single commit of discourse-core and manually declare version compatibility on an ongoing basis.
Surely it’s easier for the upgrade process to automatically run a test suite for all plugins, and then to cancel the upgrade if any of the tests fail?