There are only two 5K displays on the market that can render macOS at Retina resolution on a 27" panel: this one and the LG Ultrafine, which isn't that much cheaper. My last monitor was a 27" LG QD-OLED 144Hz 4K display. I LOVED that display, but text wasn't sharp because of the Retina resolution problem.
I also have a semi-professional webcam setup and external speakers, so those being built-in does nothing for me.
I just want macOS to support variable scaling like Windows has for, what, 15 years at least?