A counterexample as food for thought: I do all of my task tracking in a paper notebook. It looks boring -- there's no design and I only use one black and one red pen.
What I've found in over 5 years I've used more than a dozen task trackers for various organizations across different projects and teams. Each time, I have to learn the system and adapt my process to it. Every six months the productivity community goes nuts over some new app.
On the other hand, my notebook process is just the same. Paper has been around for over a thousand years and will be around a lot longer than that. I never have to keep up with the new hot productivity system or worry about the company that makes my favorite app going out of business. Paper will never release an update that makes me redo my whole process.
Paper let's me find a system that works and stick with it. Paper gets out of the way. I can focus on being productive instead of productivity.