i have had SMR drives slow to about 2MB/s with sustained sequential writes. "noticeably bad" really undersells how terrible they are.
the 3.5" barracuda disks are SMR. the barracuda pro disks are all CMR. https://www.seagate.com/products/cmr-smr-list/
100kW can raise the temperature of 1L of water from 20C to 100C in 3.34 seconds. It's enough power to brew about 300 shots of espresso in 30 seconds. That seems like a lot to me.
hmm so you are un-amused by un-necessary hyphens. i don't un-derstand why.