The vast majority of office use at my work is in the browsers because the files are stored in Sharepoint. It seems to work well enough for basic needs (no macros and fairly simple formulas in excel etc.)

I have a non-technical friend in finance who uses the Desktop versions of Excel for most of their work and they say it crashes nearly every day losing work.

Every time SharePoint/Teams decides to open a document in the browser, I cry a little. Misalignments in Word, broken basic keyboard movements in Excel, terrible performance across the board.

Excel is pretty stable.. I guess it could be those specific sheets doing something odd.