This isn't without downsides though: As somebody with a niche technical hobby, it is hard for me to order from many suppliers because they understandably don't want to deal with consumer protection laws and thus exclude B2C transactions outright ("Verkauf nur an Gewerbetreibende").

I would be fine with waiving my right to returns but this is not possible on purpose, so my only options are to shop somewhere else (often not possible) or found a company (not possible because it would be Liebhaberei - "Running a company without intent to make profits").