I dont know about that. The Linux/GPL model has had mixed success in the embedded space - most vendors still ship their code as binary blobs making it difficult

I dont know about that. The Linux/GPL model has had mixed success in the embedded space - most vendors still ship their code as binary blobs making it difficult or impossible to update the LInux kernel, which has security and other implications. But, there have been some vendors embracing the open source model to some extent at least, and a lot of third party work in supporting upstream kernel development of drivers. I dont think it would be fair to call Fuchsia a step backwards in this respect - vendors that ship closed source binaries for Fuchsia are almost certainly shipping closed source binaries for Linux as well.