Usecases: Web Dev in node/javascript/HTML/CSS, now using WSL. Notetaking in onenote + surface pen for general journaling, notes at meetups, notes from MOOCs, notes from self-language-study. Vague low-power gaming sometimes. Adobe Lightroom photo editing.
Issues: Onenote is absolute fucking garbage at syncing. It is absolutely unusable when offline. It will throw unskippable error dialogs about being unable to sync when offline, meaning I can't use it to write or take notes at all unless I tether. It is so useful in all the above usecases, with no competitor, that I have subjected myself to just getting my tether on my phone ready when I'm out and about and needing to use onenote. However, it is frustrating to the extreme.
Anybody here at Microsoft care to comment on this actually being addressed? Syncing and offline issues have been a "top priority" for the onenote team since 2014 according to the flares of investigating I do occasionally.