Nice. Software developer, gamer, occasionally 3d printing, coffee lover.
The article that user links is referring to GrapheneOS (and other OSS software) as not being “free software” - and they (GNU) delves into it more here.
Basically, GNU is saying software shouldn’t claim to be free and open source if they contain non free binaries / other non-free blobs.
The nuances between FOSS and OSS can be confusing. GrapheneOS is not claiming to be FOSS.
That’s what I thought at first, but the person who wrote the article is named Simon, and based on the context given in the article I’m assuming that was a test unit he had on his desk, but the planned implementation is in bathrooms.