This has been discussed on the forums but I don’t think a formal petition has been put in place yet. There is a security issue with using WP4.9+ plugins if they change to WP5+. No further updates are received (including possible critical security updates) and the user is totally unaware that the plugin is now out of date. Further discussion here:
I like the solution proposed by @james
I am all for including this specific feature in ClassicPress core. It should probably also show a global notice (in all admin pages) in the same style as the one that appears when a new ClassicPress update is available. It might even be a good idea to make this an “error” notice with a red border instead.
The coding is beyond me but I can certainly help test it.