I'm a hardware engineer, a lot of the cool stuff with hardware is happening in Chinese only and the general approach to getting stuff done there seems really enjoyable.

I've also had a lot of success with sourcing things directly from China and when Western suppliers often don't reply to emails for orders below thousands of pieces/dollars Chinese factories will happily make you $20 in custom cable assemblies off a Paint drawing.

I feel like learning Chinese would provide a lot of long term utility but I'm not sure I can justify the time investment, especially looking at the trajectory of translation technology potentially rendering the issue obsolete relatively soon.