Hi.
Some time ago i found info on new UV features ( like a non-dumb smart UV unwrap ) but i’m unable to find it again.
Is it real on newer versions ? or did i dream ? 
Probably dreamed it. I don’t think anything about the smart uv unwrap operator has been changed. There has been a lot of small improvements in the UV editor in the last 6 months but I don’t think any were about smart uv unwrap.
There are UV improvements in 3.4, but I don’t think there is anything like what you think you’re recalling: https://wiki.blender.org/wiki/Reference/Release_Notes/3.4/Modeling
Maybe it was an add-on?
In 3.3, there was addition of geometry nodes to UV unwrap.
thanks all for your answers.
What i ‘remember’ is a new smart unwrap able to better use texture space ( like does something like uvpacker ).
well… after searching in many places, i found what i was speaking of. You were right it is an addon and there’s a topic here about it here
Sorry for the bothering
Thanks and happy blending 