I work on something which will either be a side project for CV or a small business if I'm lucky - in either case most of the work at the time relates to development. On a typical week I put 30 - 40h into it (I don't work full time so I can afford it) and it still goes so damn slow. And the project is not anything crazy, just a standard Electron desktop app.

I can hardly imagine how someone could build anything at 2h/week. 30 min is barely enough time for the brain to switch gears.

I fully get how someone does not have time for side projects - they have life besides work, while I barely do.