Sad news. I am not expert and let me tell you that i am a big lover of BH with many features that satisfy me more than OBH.
I, too, would like to know which great features BH has that OBH hasn't. There was only one left (FCC) and now not even it is exclusive to BH!
In July 2018, when OBH hadn't already the functions it has gained afterwards, I had already explained why I preferred OBH to BH (although BH was my first love).
https://vuplus-community.net/board/threads/why-i-prefer-obh-now-just-my-personal-view.36983/
But, as an operative system, BH is totally uncomfortable: you can't even browse your recording folders, you can't customise your keys, you can't customise each single section (channel list with the number of lines, font size you like; same for recording list, and so on...)
Its menu structure is a mess and that's because of vuplus code on whom it's based.
As an operative system is like a command line OS compared to a GUI one, like to DOS against MacOS or Linux or Windows. Vuplu-based images are inoperative systems.
Maybe it's a little bit more stable but, of course it is: vuplus hasn't added anything since FCC probably, as it fears to experiment or has no way of doing.
OBH was already a very interesting image since its release 0.6! And there's when I switched from BH to OBH, imagine now.
So, I'd really like to know what features you can't find in OBH.
And OBH GUI is effective, clean, logic and the graphics (skins) are from the same author of BH, our Matrix10.
So?
If, instead, you are talking about plugins, maybe some of yours has not yet released the Python3 version but, it its authors don't, their plugins are going to die or to be forgotten.