I think spotify / discord / vscode (and derivatives) / slack are probably the most installed electron apps.
https://aur.archlinux.org/packages?O=0&SeB=nd&K=&outdated=&SB=v&SO=d&PP=50&submit=Go
https://aur.archlinux.org/packages?O=0&SeB=nd&K=&outdated=&SB=p&SO=d&PP=50&submit=Go
A lot of pretty popular packages in those lists are electron apps, unfortunately













Or Kate, which funny enough now runs on windows