FINALLY !!!
Someone dared to implement the obvious, wich was HDD's Achille's heel for so long.

Not one, but TWO (obvious), but radical changes:
* two independent head stacks – so TWO heads per surface. Awesome not just for redundancy but also seek time and performance
* multi head R/W capability on within the same stack

This means that HDDs are finally to get WAY better transfer speeds, that are likely finally to saturate at least SATA-3 and later get over 1GB/s and several GB/s.

Only things still missing:
* much smarter SMART with advanced diagnostics, like head wobble data, track signal/noise ratio, spindle speed stability etc etc.
* RAID5/6 in-drive capability
* better DIY servicability, like drive electronics interchangeability

There might be some light in the end of this dark tunnel, crated by AI crowd… 😏