Chris Wilkinson at Ars Technica is doing the Lord’s work:
I stumbled across a gem: a Macintosh IIsi. Even better, the old computer was for sale along with the elusive but much desired Portrait Display, a must-have for the desktop publishing industry of its time. I bought it the very next day.
It took me several days just to get the machine to boot at all, but I kept thinking back to that article. Could I do any better? With much less? Am I that arrogant? Am I a masochist?
Cupertino retro-curiosity ultimately won out: I decided to enroll the Macintosh IIsi as my main computing system for a while. A 1990 bit of gear would now go through the 2018 paces. Just how far can 20MHz of raw processing power take you in the 21st century?