It allows for a lot of cool accessories such as battery packs. No user swappable batteries so that’s the next best thing

I personally prefer the Mullvad client since, at least on MacOS, it allows you to exclude specific apps from the VPN, while the ProtonVPN client does not! I still use ProtonVPN instead though, since it’s also significantly cheaper for me.

That’s not going to happen

It’s only worth it if you want to support Mozilla imo. If you don’t care about Mozilla, get Mullvad instead