I prefer 3 monitors because it eases window management while being cheaper. For gaming I only need one 240Hz+ monitor and for Lan parties I only take that one.

Although for sim racing I've been thinking about getting a single ultra wide and high refresh rate monitor, but I'd probably go for a dedicated setup with a seat, monitor and speakers. It gets pricey, but cheaper than crashing IRL.

Yeah, window management is certainly better with separate monitors, hopefully this will get better with time.

On the flip side I would love to get rid of physically managing three individual pieces of hardware that wasn't made to work together as one setup.