It's standard for BSD and MIT style licenses and similar to just require the copyright notice be retained in e.g. a LICENSE file or equivalent.
A bunch of commercial software right now (cough I'm writing this on MacOS) uses BSD-licensed foundations.
A bunch of commercial software right now (cough I'm writing this on MacOS) uses BSD-licensed foundations.
Indeed it’s something of a spiritual successor to CDDL which was designed precisely for that purpose (although reliable sources also say it was designed to be GPL-incompatible, so that is literally a he-said/she-said case).