That's a tough question diplomatically on a forum dedicated to a specific product

Also it doesn't really matter what other people are using because the suitablity of the tool depends on the job it's been given to do. And really unless you want to commit about 6months up front to building something else then Guardian is a decent tool to find out if this will be your thing. Obvioulsy people who specialise might eventually drift towards bespoke systems but that's std in most professions. Guardian is a good Swiss Army knife, others are more about designing your own knife for filleting blowfish.