IPX/SPX is datagram only. BUT it would be an opportunity to build a QUIC-like that runs over it :-)

Comically IPv6 now has almost all the neat stuff IPX did. There probably is an argument for more datagram centric networking these days as the underlying services are generally much faster and more reliable and there is so much more session tracking going on at higher application layers anyway.

I've used IPX exactly once in my life, playing Diablo over modems calling my dorm neighbor to establish the connection (in 2005).

Only if we're bringing back Token Ring, too.

I remember removing the IPX route entries from our Cat65 MSFC back in 2006 and from the ATM/Framerelay WAN Equipment. Wasn't very popular with the customers.

I also remember the first IPv6 Workshop on W2k SP3 back in 2002. Not that long ago.