Comment by hannofcart

From the limited game dev experience I have/had, my recommendation is to introspect whether building the tech is just fun escapism from working on the really hard part of game dev: designing something that's really fun to play.

Building your own engine may "feel" like progress but it isn't. A fun game loop implemented with the most rudimentary frameworks, (or sometimes even pen and paper!) is more valuable than just a fancy custom engine implementation without a fun game mechanic.

Very often I find some friends of mine still in gamedev getting sidetracked by the intellectual stimulation that building tech gives them (because they are programmers) and burn out before they actually design/discover a fun game mechanic that they can actually ship a game with.

All this is ofcourse assuming you want to make money off your game. If you are just having fun with a hobby project or doing it to hone your programming skills, go nuts with the custom game engine code; more power to you!