We also have the Steinberg Series 100, now in the new bathroom for almost half a year. We have no lime stains, minimal lime deposits around the faucet outlet, but those can be removed. So far, I do not notice any increased maintenance effort, unlike our matte black kitchen :/ I also find matte black in the shower chic, but we decided against it because we actually consider it very maintenance-intensive and I’m afraid it will quickly look neglected.
Btw: Yes, fashion comes and goes. But if that means choosing a boring version that I like only half as much, then I gladly take fashion. By the way, I have been collecting pictures of interior designs for 10 years now and I notice that my taste has changed little. But that may not apply to everyone. I should perhaps add that I have never been a fan of bright colors – it oscillates more between a friendly light gray and a cozy dark gray ;)