I think the author could get most of what they want by getting a used T-series ThinkPad and installing OpenBSD on it, but that's just my preference. If they're happy with this setup, that's their business.

Nope. He uses Some software available only on windows or MacOs for his podcasts.

I am also strongly considering to jump ship from Mac to windows now. However, I have some software licenses that won’t transfer so I’m waiting for the renewal periods to expire.