32-bit ASNs have been a thing for close to 15 years now. Any older equipment likely wouldn't be able to handle a full routing table anyway. I remember setting

32-bit ASNs have been a thing for close to 15 years now. Any older equipment likely wouldn't be able to handle a full routing table anyway. I remember setting up BGP in 1998 for a local mega corp. They had 2 full T1s! I think there were only 50K routes.