PWAs will likely continue to remain underused on desktop until they gain some important missing bits of desktop integration.

For example on macOS, Electron plugs into the global menubar, making it easy for web app devs to give their Mac users native menus instead of falling back to a redundant in-app menubar. Nearly all electron apps on macOS take advantage of this feature, and if they migrated to PWAs they’d lose it.

PWAs also lack fine grained control over window chrome which puts them in an awkward twilight zone between browser window and desktop integrated web app.