I use OpenBSD as my daily driver and develop software in Go. I use DWM + tmux + nvi + git.

Pros:

    - no-bullshit OS
    - very clean, you know what is where and why
    - distraction-free
    - proactive security approach

Cons:

    - slow if you use heavy software like Chrome

Potential deal breakers you should know about:

    - web assembly is turned off by default for security reasons (login to Hetzner or Sinology, using Google Docs is a problem)
    - watching videos in the browser does not feel great

I conclude that it is great for (my) work and encourages you to be minimalistic.