I feel you've answered your own question. If you want to make a single app that can be web or offline, and cross-platform, Electron and friends allow you to do

I feel you've answered your own question. If you want to make a single app that can be web or offline, and cross-platform, Electron and friends allow you to do that. It's a trade-off of dev effort for user experience, and as much as many devs hate that philosophy it allows many things to exist that otherwise would not be worth the effort.