English has lots of loan words using accents including common words like café and résumé and more uncommon ones like crème brûlée. It has native although uncommon accents, e.g. in coöperation. Personally, I also commonly type in Swedish which has the extra letters å, ä and ö in its alphabet, sometimes type in German (ö, ü and ß) and occasionally use an IME for 日本語 (Japanese). IME aside, losing direct access to the above accents, all of which are muscle memory by now, is one of the major reasons I probably wouldn’t consider a Windows laptop.

(I didn’t mention metakey access to typing typographically correct characters: –, “, ”, ‘, ’, … etc)