These make great (IMO) bridge machines as they can run 10.2, which supports both AFP over AppleTalk and AFP over TCP, so you can connect to them from both classic and modern Macs. I have a 900 MHz which is serving as a bridge between my Centris 650 (via Ethernet), my Duo 230 (LocalTalk to the Centris which is running LocalTalk Bridge, then Ethernet to the iBook), and my Catalina machines. They can also natively boot and run 9.2.