I always like hardware manufacturing over software.
Whenever I've visited mills or shops, even once a real industrial smelter and forge, the machines and ambience were amazing. Some of this tech runs well even though it's over 100 years old.
Recently I visited an old 19th century factory that had been converted into a fabricator centre with 3D printing and CNC milling
>mfwhttps://www.youtube.com/watch?v=9gIMZ0WyY88