[mirabilos]

There is still quite some amount of hubris in this.

If A writes software under L0 and gives it to B and is “nice enough” to allow B to use it privately for free, there’s some entitlement to the software.,

You’re overlooking that, in a contemporary environment, you’re standing on the shoulders of the giants (and all the small ones) who came before you. It’s absolutely presumptuous to write code in our time and not publish it under an OSS licence.