"50 years ago" could be replaced by writing a decade to make this answer more future-proof.

Are there programming languages that have iff as a keyword? How would it be different from if in source code?

In the space industry, the developments in New Space share some characteristics with waterfall vs. agile work methods.

you absolutely cannot fix things after launch — do not underestimate the creativity of scientists and engineers trying to rescue a space mission where a critical problem occurs ;)

You don't own the name, so wouldn't you have to rename it when you fork it?

@ThomasOwens If 50 projects have PRs with "implement workaround for numpy#12345" then 50 messages will appear under numpy#12345 — spammy?

Was the asterisk after "No changes ever needed" meant to refer to a footnote of some kind?

Every time you type git clone, you are copying code. Every time you make a backup, you are copying code.