We are using Perfmatters and the plugin ‘Plugin Organizer’ (which handles switching plugins on and off per page, global, standard or mobile).
The combination of only load uses js and css would do the job of Perfmatters and Plugin Organizer in one automatically per page instead of having great admin efforts.
It’s very complex to handle 10-20 plugins on a site with hundreds of pages and posts. Automation is key.
Best … Horst