I use four monitors for my WFH setup with a total of 11.8m pixels. Three 6k monitors is 37.3m pixels, more than three times what I've got. I'd be seriously considering this if I could run all four, but for now the hackintosh lives on.
Honestly, even 3 isn’t enough at times and I’m not doing anything crazy. Mostly Chrome, Teams, WhatsApp (ugh), Outlook, and Excel (god, so much excel).