The gears have been churning away and Plasma 5.7 beta is out for testing. But what’s that I hear? How can you test it?
Why with KDE Neon Developer Edition Git-Stable Branches of course, until now the little sister of Git-Unstable Branch variant, it comes into its own when you need to test betas such as this.
Grab the ISO, install it (on virtual machine or real hardware as you please) and find issues to report to the Plasma team.