Yesterday I got my old Mid 2007 Mac Mini out of storage along with my old Airport Extreme base station from 2003/2004 and set up file server and independent wireless network for all my vintage Mac's.
Works great so far with my 12 Inch PowerBook, iMac G3, G4 Cube and eventually my TiBook when it arrives. I can also share my iTunes Libary on all machines without much issue.
In this pic I went back to the year 2000 after I got the Wifi working lol. I was playing about with Classica in OS 9 and the Internet Archive's way back machine on my iMac G3.
My replacement speakers arrived to replace the rotted out ones in my G3, so I swapped them over today as well.