Latency and audience
Mainhausen sits in the Frankfurt metropolitan area, the de-facto European hub: 10-15 ms to Berlin or Munich, 15-20 ms to Vienna or London, 25-35 ms from Spain. It is the natural DC when your audience is DACH (Germany, Austria, Switzerland) or central Europe. Typical fits: German B2B SaaS, industrial Mittelstand, Austrian-Swiss fintech.