27" is really the best screen size for productivity. Easily can find 1440p or 4k 27" monitors to pair, and they have come down a lot in price.
https://www.dell.com/en-us/shop/dell-ultrasharp-43-4k-usb-c-...
Also, too bad all the TV makers stopped making 8K screens in 55" and below.
Of course, the market has also decided that decent aspect ratios aren't worth doing either. If there were 3:2, 4:3, or 5:4 options—more versatile for productivity—we'd probably settle on something between 21" and 24".
I just wish that the base macbook pro models supported 3 external screens without resorting to a software-based video-over-usb DisplaySync (not DisplayPort) connection.