…because it’s awesome.
I have no affiliation but holy cow is it useful, and I don’t see it mentioned much.
I hope mods won’t mind my linking to it: ZwiftMap
I find myself using it ahead of time to see route and segment profiles, and then during a ride to give me an idea of what’s ahead on a route I’m riding. You can search by route name, sort by world, distance, elevation gain etc.