> serious app will need C++

What does this even mean? This is not 1980 or whatever, even a device the price of a coffee (RPi Zero ~$10) can handle a LOT, like an entire OS. I'm not saying resources don't matter but for most people doing normal computing (so not weather simulation, 4K video editing of 4hrs long content, 3D modelling of high res models...) pretty much anything in any language is equivalent.

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