While it is completely possible to get a decent sound out of a microphone without using a preamp to boost the signal, most people who are serious about their sound prefer to use one. In fact, I would say mic preamps are more prevalent now than ever, even if they’re less obvious as they use to be. Preamps, which were usually once only available as a external pieces of gear, have started to become built internally into other recording gear that people already buy. As a result, some people may never really feel that they need a preamp for their particular studio setup. Those that do need a proper mic preamp are always on the search for something effective.