Why do you need web apps wrapped in their own window, though? Just open a browser.
Relatedly, Electron is a problem because desktop apps nowadays require a huge browser just to display a window, not because web apps are packaged in a browser to get slightly better desktop integration.
works offline
has more permissions
can use udp
separate alt-tab, tray display
is not throttled because it's in the background (on desktop)
unaffected by browser settings
unaffected by clear cookies
unaffected by extensions
less confusion over who handles keybinds
I like Slack and similar having their own icon and entry in the alt-tab switcher. Absent ubiquitous PWA support, electron is sort of the least bad alternative.