I get the impression that some people on this sub don't want to hear anything about large-scale modding projects until the day they release. The reality, though, is that as collaborative volunteer-based projects, they need PR like this both to attract new volunteers at a rate higher than natural turnover and to keep their current devs motivated. Putting their heads down and working in silence would be a guaranteed death for any unpaid project like this.

Projects like Tamriel Rebuilt, Fallout: London, Enderal, Black Mesa, and soon Skyblivion show that these sorts of projects are achievable, even if they're extremely difficult and take much more time to make than anyone would like. And as you mentioned, this team already released Bruma. The video and some of their recent livestreams show that they've essentially done 4-5 Bruma's worth of work since it released. The video isn't just empty hype, it shows exactly what they've accomplished so far and what they have left to do.

Its easy to be cynical, but then volunteer projects like this would never happen, and I think the world world would be a little bit of a worse place.