Hi
My 1993 A1200 is still running here on the original ROM and is fitted with an internal IDE, 2 x external SCSI drives, ZIP drive, ethernet with broadband and CDRom drive and quite honestly I have never noticed the difference. I have other machines with 3.1 and also the later OSs, but really I still use my original A1200 as the grunt machine here for mail and disk work and I have never felt I needed to upgrade. Works just fine.
scuzz
http://www.commodore-amiga-retro.com