In reply to Bjarne Oldrup.

Excellent idea – the problem is, there are so many plugins and themes that are no longer supported and the developers have ghosted, that end-users have no idea what to do now… rebuild their entire site? Never update WordPress again, after learning their lesson? I hope not. A new industry of recoding old plugin/theme’s Javascript files will be born, and perhaps that’s what’s needed to keep WordPress up to date – users need to understand their plugins and themes should be updated regularly, and if updates are no longer available, recoding the outdated code is vital, whether it be jQuery, PHP, or mysql() calls.