Hehe, I also moved to an Outlook company a few years back. I’ve had to switch completely to the Outlook Web App (OWA), the native app gets too bogged down after a while, and it’s frustrating to deal with Outlook native across multiple machines. My Outlook experience was vastly improved when I stopped using the native client. And there are a lot of reasons I prefer Gmail as well, Outlook seems to lose threads easily, the spam filtering isn’t as good, and it has all kinds of unintuitive UI quirks and gaps.

For an application which has rendering HTML content (emails) as its primary function, being a PWA and using something like Electron actually sounds like a good choice.