on it's own!!!
It flashes pretty quickly too. The STlink takes about 8sec to erase and
write. I'm guessing it's erasing the whole 128KByte though. My own
fwupdater takes ~3sec to flash, ~1.5sec to erase. So there might not
even be that much room for speed up. 3sec is hard to beat signficantly
anyway and it comes at the cost of bytes. Perhaps even complexity and
risk of OUT packet errors/loss on the device side. So kinda like
leaving it as is.