But even there things change and get better (mostly). I still have my old Elu MOF98 1/2in router from c.1982. It's 110v, it works, but against the current tool I use it's big, heavy (unwieldy), is single speed (almost all current 1/2in routers are variable speed), has a poor fence system and no dust extraction. That's why it got replaced. A lot of tools have similarly been replaced by faster/more accurate/cleaner/lighter/smoother tools over the years, I keep that router (and a number of old tools) only as a backup these days.
As i said, old doesn't necessarily mean good. So why keep heavy, poorly performing tools? Do you have Yorkshire blood or something?