The Whiteboard app first takes seconds to start, then it stays some additional seconds showing an empty screen until it decides to start the login process, then it needs a couple more seconds until you can actually sketch down your note. By which time I have already forgotten about whatever I was going to write down.

Setting the pen button to launch OneNote is now literally faster than Whiteboard and that's just ridiculous considering the idea of not putting OneNote in there in the first place was to have something quick & snappy to take quick notes.

The "just press the pen button and jot your ideas now" idea was broken the day they shipped Whiteboard. The "new" Microsoft is just as ridiculous as Google. They kill their own usecases as fast as they create them.