[Felger]

I can remember 486 Motherboard in Packard Bell (quite the entry brand...) systems frequently used 36 bits ECC FP SIMMs.

Printers and plotters from this era used ECC modules most of the time.

But by the end of the century, they were replaced by unbuffered, unregistered 16/32/64 bits modules.

Every mid range server still use ECC. Entry HPE Servers use ECC UREG (unregistered, 9 chips) modules, while mid range and more use ECC REG modules (9 chip + interface controller onboard). Ironically, UREG module are more expensive than ECC REG.

Also, most workstations used ECC modules. Less frequently since 4-5 years.