TB4 DAS for MB pro - anything new?

[Enquiries]

I am an independent doc Cinematographer/editor/post guy desperately needing to expand and simplify my storage for projects. Very frustrated that there still seem no great solutions. Anything new you are aware of since your excellent review agreeing with the above? Am eying OWC Thunder at 8 (or even 4, despite having no rack to mount it in!) so I can use PCI slot for a black magic decklink. Some say use Apple Raid mirroring with this set up? Ideas? Advice? THANK YOU!

[ed]

No, Thunderbolt4 is moving very slowly. Mainly because of Apple priority.
But otherwise there are only TB3 solution from Pegasus, Areca, Netstor, etc