I well remember being an early UK ISP and after we upgraded from dial-up UUCP links, having a whole 9600bps upstream (via Courier modems over an analogue private wire, IIRC). That was shared amongst all our customers in effect!

I still try to build pages that would work acceptably at 9600bps with all the headers and the first meaningful body text within the first TCP frame... The lowest that WebPageTest will emulate is 56kbps. "Kids these days" as noted by an earlier commenter! B^>