Eric Schwarz 
It only took 21ish years before I finally ended up with one after writing about it…yes, there will be some updates and tear-downs: https://schwarztech.net/articles/the4400 #vintagemacs
I ordered a USB card for the 4400 (running Japanese MacOS 8.6 for now), and then I ran into the issue of getting the Extensions loaded on…found them online, but how do you get things onto a computer with no Ethernet or USB from a modern Mac? DOS-formatted floppy for the win!
(Ethernet card en route) #vintagemacs