@adiz @RustyCrab >Haiku is free and open source
I do hope that Haiku is 100% free software, but *all* nontrivial OS's I've looked at have contained proprietary software, except for GNU.

Weak licenses like MIT expat are a red flag for proprietary components, as it expectantly allows sub-licensing.

As always, I found proprietary software and proprietary licenses in Haiku in under a minute;
https://git.haiku-os.org/haiku/tree/data/system/data/firmware/
https://git.haiku-os.org/haiku/tree/data/system/data/licenses/Intel%20(2xxx%20firmware)
https://git.haiku-os.org/haiku/tree/data/system/data/licenses/Marvell%20(firmware)
https://git.haiku-os.org/haiku/tree/data/system/data/licenses/Artistic

As Haiku contains and seemingly recommends proprietary software, it is proprietary software.


Tacking "open source" onto freedom is a mistake, as at least 2 proprietary licenses have been approved by the "OSI", thus by attempting to endorse "open source" equally to free software, you are endorsing proprietary software just as much as freedom.

Unfortunately, most people assume that "free and open source" means "gratis, source-available software", which is a very difficult error to rectify.

Once you've informed someone that free means freedom, they won't ever confuse free software with gratis software again.