Well if you want to go back even further. I had one of these running CP/M.
S100 bus systems were the thing. Most processors ran at several hundred kHz. This ran at 4.77MHz!
Four point seven seven
million cycles per second.
And 64KB RAM!
Modern CPUs have more
L1 cache than that with speeds of hundreds of gigabytes per second and single digit nanosecond access times.
That's technology for you.
Look at that power supply! If you just saw it on its own you would think microwave oven, right?
I also had a dual 8" floppy disk house. The spindle motors were actually AC shaded pole motors!
And Winchester disks. Even as recently as the late 80s high end PCs with hard drives were touted having "Winchester" drives but that just meant hard drive.
Veterans know how they got the name.
30MB today isn't even enough to store most smart phone apps.