Rumors circulating that Bitmain's latest fiware upgrade prevents the install of custom 3rd party firmware. On multiple levels, Bitmain is far too powerful.
This on its own is not "bad." But it is a very slippery slope on where it can go.
Locked bootloader's never last. Someone will crack it.
Surprisingly no one has cracked Whatsminer's. That I know of. Maybe no one cares enough with MicroBT lol.