Everyone's not using it. Look at the poll for a sample of recording artists among this forum. You might find similar statistical trends everywhere else. And no, your rationale is flawed. People don't use the best thing. They use the easiest thing. Which is why Adobe still exists as a company. They have shite products, many of which can be replaced by other software that is far superior. However, a majority still use it for transferability between clients and vendors. That is the unfortunate state of things, which is slowly trending away as more and more people jump ship out of frustration to use better tools instead of the popular ones. So no, Reaper isn't #1 by volume, and while I am partial to it, I want to acknowledge that and as well point out that in S.O.S polls it has consistently placed first for best DAW regardless. ProTools and AVID are the Adobe of the audio world. Everyone curses them, but a majority still use them. A shrinking majority.