All my non-signed apps still work on 15.1. Therefore, Gatekeeper seems to be involved here, and just setting the metadata from the command line should be enough to bypass the check.

I may even write a service to automate this so I can just right click an app and select “authorize app”. No going into settings needed.

I didn’t even realise Control-click was a thing until I heard malware was tricking users to run it via this method. You can still go to System Settings > Privacy & Security and allow the application from there so this isn’t the end of days.

“Forces”

Clickbait headline. All you have to do to run unsigned apps is add them to the approved list in System Settings.