Where are the E21T based PCIE4 'mainstream' m.2 SSD's?

[PeegeeTips]

Looking for a very power efficient m.2 nvme SSD able to saturate a high-speed USB connection in sustained trasnfer, and able to do so without thermal throttling in a poorly cooled environment - like a caddy.

That sounds like an E21T based m.2 ssd, so where are they?

Open to alternatives that fit these power/performance parameters...

https://www.anandtech.com/show/16425/phison-at-ces-2021-new-usb-and-nvme-ssd-controllers

 

[Snapshot]

They were announced in January so it could be another six months before there's actual product available. You need to allow for the global silicon shortage as well so could be even longer.

 

[EsaT]

Hynix P31 would be very power efficient
https://www.anandtech.com/show/16012/the-sk-hynix-gold-p31-ssd-review/8

And just forget high up models.
Any drive but QLC drive in sustained write can saturate USB3.