is anybody still using dolphin or even create & update plugin ?

Hi Kane Khongsay - UNA is designed as an evolution of the Dolphin system. Many clients still use Dolphin because of the expansive range on plug-ins available, but increasingly the range of functionality in Dolphin is available with UNA.

There are distinct functional advantages of UNA over Dolphin - notably the support for remote storage and mobile devices, and the separation of the configuration and administration layers, as well as automatic updates, makes UNA a system with more scope for larger sites, with huge advantages in being able to customise each pages for mobile devices.
Whilst Dolphin still works great, and is continually supported, most new projects we recommend start on UNA rather that Dolphin.
There is a migration script available to bring your Dolphin site into UNA.