Bit of a late update here but 4.1 rc1 was released last week and is available for everyone to try / test.

https://github.com/PIVX-Project/PIVX/releases/tag/v4.1.0rc1

As mentioned in the previous dev update above, this new release uses around 900 MB of RAM instead of 2.6 GB!
Also has tons of UI/UX improvements, much faster and smoother network sync, better overall performance etc.
Testing has been going well with many minor issues being addressed before its final release possibly next week!

Once 4.1 Final has been released, will update here.