FWIW i have more modems routers cables adapters networking peripherals and other suchlike than i can comfortably remember easily. most are how-you-say 'legacy' but not all.
in other words, if my newfound favorite local home away from home finds itself in need of something, upon re-investigation, this assessment may happily prove erroneous.
ff
ps AFAIK i do not have spools of cat 5, though i know someone who used to have at least one (we didn't take it because space becomes an issue in a small apartment, especially, as i have come to understand, if one of the people living there is ...me)(i used to half believe the desktops seized every unobserved opportunity to get it on, leaving their offspring, discoverable, somewhere i was bound to find them )
pps i could make similar statements about computer related soft- and hard- ware not specifically enumerated above, by which i mean to say, the same offer holds true as does above....