Outlook on the desktop is pretty much in maintenance mode only and Microsoft is already breaking it[0]. As for web version runs on linux just fine so you are in luck.
In general, unless you need advanced Excel features, you can switch to linux.
We use Exchange on-premises, and the web client is really bad.
While email is asynchronous and I can live with not seeing it all the time (I check it occasionally anyway), the calendar feature is a must, and specifically the reminders. This is why I cannot live without Outlook launched, and it reminds me of meetings I would miss otherwise.
Didn't expect onprem since microsoft has super weird requirements on it since v2019 and haven't properly maintained it for years (except now you are also supposed to pay for it monthly), but if you would suffer with the old web version, you may want to look into Evolution+ews which should be able to handle onprem exchange on linux. Unsure if it supports niche features like public folders but the normal stuff should be covered.
In general, unless you need advanced Excel features, you can switch to linux.
[0] e.g. https://www.neowin.net/news/microsoft-cant-help-break-window... and couple others