Quoting from the thread:

> Hmm, I've been curious why Apple switched back to Pico. I'm sorry they seem to have declared war on GPL software, but this seems to be recent revelation. For years OS X distributed nano with seemingly no issues. What changed?

What changed is the GPLv3. Apple was fine to ship software that was under the v2 of the license, but that changed when the v3 was released and most (all?) GNU software jumped to it. (This is all leaving aside why Apple lawyers chose to go this route.)

It’s the same reason why macOS is stuck on an ancient version of bash. Here are some more details: https://jmmv.dev/2019/11/macos-bash-baggage.html