I would love a story on

"I don’t like much what the underground programming world became in recent years"

What could he mean? What underground programming world is he talking about?

Probably the roving mobs on Twitter who occasionally brigade project issue trackers and mailing lists. Check out the master/slave post he wrote a while back.

Or just the toxic nature of some open source communities, especially on Reddīt for whatever reason.

This.

The underground in underground programming refers to maintaining low visibility, as to present low target silhouette. Additional benefit is not attracting too many participants that are in it for the clout, rather than for solving problems & good engineering.

Open Source is no longer sufficient for software freedom; the current 'battlefield' is maintaining security from activist pressure or gradual take-over.

I created the Occupy Wall Street website nine years ago. Believe me when I say the lengths people will go, to try and control community projects, is downright traumatizing. I never could have imagined that same kind of nastiness would impact open source.

If you don't feel comfortable engaging with the new toxic culture, you can use my underground liferaft. My liferaft isn't an operating system, but rather an attempt to help us not depend on them as much. I have no idea who's controlling GNU/Linux these days and Occupy was enough drama for one lifetime. My code has the same focus on clarity that Antirez put into his Redis codebase. My liferaft also empowers you to build and distribute tiny native portable programs (like Kilo!) using hermetically sealed tools. See https://github.com/jart/cosmopolitan