I'd also be curious to know what features that Edge doesn't support. I know it doesn't do everything Chrome does, but I haven't run into any scenarios that Edge didn't support in a long time.

It's a pet peeve of mine that apps don't support Edge/Trident, Vivaldi, etc. It's easier to write cross-browser code than ever, but it seems like we're in the process of reverting back to the bad old days when IE6 was the only browser people supported, but it's Chrome now instead of IE.