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> Download and run code written by strangers without understanding what it does

Like a web browser does?

There's certainly a risk difference with code that runs in a reasonably well thought out sandbox.

That — and I am not a big fan of browsers getting more and more access to the hardware/OS over time.

That means being beholden to native apps on every platform if you want to do anything at a lower level. I'm not sure that's a better solution.