When it comes to significant amounts I would regard the lack of cloud bankiness as fucking superb news. I would never trust Revolut with anything above amounts needed to pay for hand jobs in airport toilets in far off lands.
They shut people down for the most piddling reasons and amounts. I wouldn't do a large sale without being confident it would go through smoothly from start to finish and there's zero guarantee of that with some faceless entity hiding behind an app. With a real bank you have a fighting chance of reasoning with a real person somewhere.
I can confirm Revolut works for sums like $2-3k perfectly well (a bit more than an airport handjob I guess). Haven't tried bigger sums but it seems it should work up to something like 5-10 grand. If we speak about at least $50-100k or more I wouldn't do it via Revolut. Perhaps someone here has more experience with bigger amounts?