I got one. It's a definite step up. I run a lightning node on in it (been running lightning nodes for some time). It works much more reliably than the 4 did. Now with the option to add an m.2 drive i will update that as well. Anyway. It's a significant improvement and handles lnd and cl very well.
Discussion
Oh yeah, the PCIe stuff might be new too. And m.2 drive?! Damn that's nice