I am a day zero user of tb. It looks like the best deicision I could have made. While this project had ups and downs, it's still alive. There were so many huge improvements. Things may take longer here, but are done in a high quality way:
Core updater (this is fucking awesome)
Extraction of dependencies
New image support (webp)
Bug fixing / php support
I am sure @Eolia has his reasons, why he is doing this on his own. But as I can see, his project is not on github. Which very likely means, that he is really doing this his own. For me that would be too risky.