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Personally, my brain manages to filter out anything with a leading underscore (I don’t know the origin offhand, I think some system I worked with at some point used those on files that I knew I didn’t care about). So when coworkers use leading underscores it slows me down a bit.
It does work though
“Tech” is a conflated term. The way I read OP is that they don’t want their cars main user interface to be a smartphone app. Doesn’t mean the car can’t be technologically advanced.