I've seen payments being another problem - but Garmin watch handles it for me. And paying with a watch becomes a conversation starter with merchants for some reason.
However Wallet didn't like this setup. Tokens expired at varying delays, sometimes a day, sometimes a week or payment failed without reasons.
Nowadays, I just use my bank's app which work fine on GOS.
I was actually very surprised Garmin supported the country I'm in. They don't even support the language script, I get squiggles, but payments - better than Google Wallet.
GOS has much better battery than stock pixel ui because of less services and telemetry.
Sounds reasonable. People tend to install way too many apps on their phones and than blame the phone about short battery life or too many notifications.
Android also takes permissions away from apps after they haven't been used in a while anyway.
So most of the battery consumption will be from the apps that you actively need and use. Android's battery usage screen backs this up.
The metro app I installed when I was on a trip in Istanbul is still on my phone, but it's dormant. Yes, I should definitely uninstall it, but I really can't be bothered to do this all the time. On stock Android, phone takes care of this for me. On GrapheneOS, either I take that responsibility or face the consequences - which I don't really want.