Use it out of habit on Windows but been annoyed for years at how slow the UI is. I frequently open an email and start typing a reply and have to wait 10 seconds

Use it out of habit on Windows but been annoyed for years at how slow the UI is. I frequently open an email and start typing a reply and have to wait 10 seconds because it locks up for some unknown reason. I’ve never been able to figure out what’s going on and this has plagued the app for a good decade at least.