As you guys can probably tell by now I just love understanding the evolution of things. It is almost like a biological system with even branches that ended up in an evolutionary dead end.
Look at this beauty from 1980 by the
Cook Brothers, Three Bar BMX Cruiser:

Brooks saddle, TA crank, caliper brake on front and coaster brake on the back, a totally modern (for it's time) unicrown fork, rear facing horizontal drops (in case you ever wanted to turn it into a track bike) and of course a road bike quill because it was just begging for it to complete the package.
I'm not gonna lie I would ride it.