The CPU isn't that fantastical for the 1980s. The Archimedes had an 8MHz ARM in 1987. It was expensive though and came with at least 512KB RAM.

P.S. After I wrote that I looked at the Wikipedia page. Which helpfully reminded me that 1987 was 38 years ago :(

Fair enough. I've gotten out of the habit of thinking exponentially about computer performance. Modify my original post to that 1980s 8-bit era of personal computing. I did intend to compare it on the basis of the RAM available, which as is observed in another correction puts this more in the VIC-20 era...

... for those of us old enough to even have a mental distinction between "the VIC-20 era" and the "Commodore 64" era rather than just being a smear of bittyboxes all equally uselessly small....

The 386SX came out in 1985!