144
Why Are Micro Center Flash Drives So Slow?
(hackaday.com)
This is a most excellent place for technology news and articles.
Yes, especially write. The number of USB sticks faster than SATA (~200 MB/s) on the market is pretty limited.
And not much better in read speed.
One main point is; fast sticks have sizes in the range of USB-SSD-enclosures, for heat dissipation. Faster flash, more parallel connected layers, faster controllers, require that.