JohnH77 – 17 mins ago »
I think it must be a limited roll-out. I powered my 4000T down and rebooted and even checked for new software and I am still on 051 from 2019.
There’s a post on the other thread that says everyone will have it by next Wednesday 22nd July after a chat with Humax. It’s not clear if that’s all 4000 and 5000 boxes. Seems likely 
Edit – Watch this space I will post what happens to my 5000T.
I use a 4K firestick for on demand and media playback. It has a number of advantages especially for playback of 24p content.