As many have pointed out already, this is a user to user forum, with special guest appearances by actual Cakewalk programmers (and other paid professionals who do work on Sonar), and that a "goodbye Sonar" rant is best sent to the programmers, customer service, or tech support, for optimum usefulness. Complaining to users who already use and enjoy Sonar will only solicit snide comments and (from the "good" people) helpful hints in using Sonar that you may not have thought of.
But generally speaking, when I see someone taking this much time and effort to announce a "software usage suicide", I would ask two things: 1 - Could your negative feelings towards this product cause you to harm yourself or others? and 2 - If so, have you sought out professional counseling to prevent you from harming yourself or others.
If the problem has not reached that level of emotional turmoil in your life, and is actually (as another poster mentioned) more akin to a "paper or plastic" type of decision, then I would say these types of decisions should be left up to you, to follow your heart and decide what's best. Otherwise it would be like me standing in a supermarket checkout line, holding up the people behind me, and verbally expressing my personal views on the pros and cons of using either paper or plastic bags to carry my groceries. While some people in that line may be interested in my views of ecology, environmental concerns, and job retention for lumberjacks and paper mill workers, most people in line would mostly get impatient and angry because they just want to get checked out and get their ice cream home and in their freezer before it melts!
But seriously folks, if the OP would have rephrased the post into a question, "Can Sonar do these things that FL Studios does?" It would have gone a lot further and been more accepted as a true request in a decision making process, that you have already seemed decided on.