For me, the major downside is not being able to connect the PS5 and enjoy 4K gaming on it.
There is a rare adapter that apparently enables 4K gaming on the Studio Display, the
SIIG HDMI to DisplayPort 1.2 Converter with Audio Extractor, but it is out of stock and nobody knows if it will ever be available again.
I don't know of any other adapter that is capable of taking the 4K signal from the PS5 and showing it on the Studio Display with minimum lag and no loss of resolution. Most cables are able to take the PS5 signal and show it in 1080p on the Studio Display.
That's why I'm considering other alternatives, such as the Sony M9 monitor, or the Dough Spectrum One which is one of the few glossy monitors in the market (I know it carries its own risk purchasing from Dough, I am aware of the track record of Eve).
But then, people say that macOS doesn't look really well on 4k monitors, unless you choose the native 4K resolution or the "looks like 1080p" 2x scaling.
So... I don't know what to do. If Apple had made the monitor more open to be used with other devices, I would have bought it without questions.