the catch is when you really need specifically O365 for some reason, e.g. we had to get the O365 download version for my kid's schooling because that was the specific version the "this is how you do office shit" classes were taught against, the online O365 didn't cut it
of course even the teacher was telling the kids "look you should just use libreoffice" lol
you are both correct and fatuous, which is an ideal combination
assume that in the past 25 years everyone here has heard the gospel of RMS