I have seen a number of different rackmount case designs intended to vertically mount a number of raspberry pi 3b/4 boards in something like a shallow depth, 3U

I have seen a number of different rackmount case designs intended to vertically mount a number of raspberry pi 3b/4 boards in something like a shallow depth, 3U enclosure. One of the design problems has been that the power jack is on the other side from the networking. Some people have solved it by additional DC-DC circuitry as a hat to power them from 802.3af. And the microsd card is accessed from the other side. But some model of rpi with all of its external connections along one side of the PCB would be very helpful for doing this with less third-party hacked up solutions involved.