I don’t understand your use case. If you’ve got legacy projects that you don’t want to touch, why upgrade a dependency to a new major version?
You can keep using jquery without having to think about it. Just keep using version 3.7 and don’t even think about version 4.
Zardoz84|1 month ago
I recently had to upgrade from jQuery 2 to the latest version, because an client demanded it (security issues), and just ran into compatibility issues with third party libs/plugins.