Which Samsung are you talking about? We got some new screens at work, Samsung S9 something or other. 27", 5K, thunderbolt 4. As you say, the text is very sharp, and colors seem fine enough. But that's about it, and I would not recommend them at all.
The worst issue is that the viewing angles are ridiculously bad. I'm sitting at arm's length, and the borders are very dark and somewhat blurry. They're of course OK if I move and look at them straight on, but my 32", fairly old LG doesn't have this problem.
Another pain point is the fact that it cuts off the power supply and the USB peripherals plugged in when it goes to sleep. I couldn't figure any way of disabling this behavior. But if you leave your PC running and expecting to connect to it over a USB network adaptor or similar, you're gonna have a bad time.