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I'm sorry but what is the point of this article? TL;DR Alsa is buggy? Ubuntu terminal is better than iTerm?

TL;DR: Ubuntu feels like it has my interests in mind, macOS feels like it caters to Apple's.

"Feels like" mind you. Completely subjective.

Would not surprise me if the sound issue is PA related, and he has to go to alsamixer to bypass PA's tomfoolery.