This is going to be a huge problem for many sites for many years to come (my prediction). There are so many WP sites made by a plugin jockey with commercial plugins and themes, the owner has no idea how to update or maintain. When the site starts breaking, they will get mad at WordPress, and move to Squarespace or something else they won't have to worry about. Less jobs for developers.

I don't onow what the long term answer is, maybe WP should never have bundled jQuery, maybe the updater should be able to check for compatibility and require the correct version of jQuery. But this sudden change in WP from never breaking backwards compatibility to breaking every other update is not a good look.

This is why i rarely use commercial plugins on customer sites and keep everyrging in git, disabling auto updates.