Good chance that doesn't trickle down to the microSD interface; it seems like the best performance improvements are reserved for the full-size SD cards, likely because they can fit more thermal mass and connection pins in the larger case.
Fun engineering decisions: It can use RAM from the hosting computer to store its logical block mapping tables so it doesn’t have to have DRAM onboard for that. That’s a clever way to use what the host has in abundance to avoid putting it on the price and volume constrained microSD card.
Now… how you are going to get the heat out of it when it is running at 1GB/sec. I wonder if we will see new microSD sockets with integrated heat sinks.
https://www.theverge.com/circuitbreaker/2019/2/25/18239558/m...