I agree on most. They where pretty open about what Nanite and Lumen can and cant do after releasing the demo last year. When we where switching to UE5 we where aware that it wont be perfect or feature complete. But… In our case we do need Lumen and Nanite. And a new stable EA3 version after half a year would have been nice. Its not a magical solution for all problems but if your 99% estimation is correct then why is it such a big deal for people? 
Its lowering the production time for small studios/teams (working on certain types of projects) significantly.
Epic said UE5 will be released early 2022 btw.