In a controlled environment this is perfectly fine, where dust and moisture can be controlled - but we're talking about moisture from steam coming off of the coffee, the possibility of coffee spillage on the machine, organic dust from nearby humans, non-clean power supplies and loads which may fall outside of usage rating (i.e. obstacles or heavy loads or continued use close to its maximum).

Honestly I would be surprised if it's still working in a year in these kinds of conditions.

Another issue with smart motors that generally isn't discussed is that they wear out (can only handle lower loads) and lose accuracy. I've used magnetic encoded smart motors for a few projects and after two years you can't rely on them anymore - and this is easy work for the servos (occasional usage).