Yep, totally agree. I have 3 SW setups-- 120 reef, a 120 FO, and 10. The 10 needs to have FW added daily, the larger tanks need it every other day, every 3 days at edge of the range. The 10, with only a few worms, one crab, and some snails, can go a week or more without feeding, as can the reef. The FO, though, has some fish that will go for 3-4 weeks without feeding, if they absolutely have to--though I'd be ashamed to even try that. And of course, it depends on what you mean by running into problems--all three tanks would develop a pretty thick layer of algae within a week of no maintenance.
Why are you asking?