This is the big bottleneck, plus, for shipping jobs (say <2 month timespans), writing some of the basic stuff eats up more time than you want. I've been doing

This is the big bottleneck, plus, for shipping jobs (say <2 month timespans), writing some of the basic stuff eats up more time than you want. I've been doing an engine on the side (c++ underneath, javascript on top) for pc,Hololens,magic leap,Mac, android, we , pi/Linux (finally) for about 4 years now. I can churn out tools (editors, daemons that run for months, hot-reloading remote-assets, vr apps&overlays, ML tools, streaming point clouds) and demos, but it's still missing rigid body physics and a lighting engine (outside ray marching) I still have to resort to unity or unreal to get jobs out, because there's too much to do for one person. (Although this is finally starting to change :)