I've found that having tasks last 10 minutes is an activation energy economizer (with option to extend 2x10 or 3x10 if in flow). It also simplifies the overhead

I've found that having tasks last 10 minutes is an activation energy economizer (with option to extend 2x10 or 3x10 if in flow). It also simplifies the overhead of deciding how long something should take. I think the key takeaway from it all is that one would benefit most from iterating on their system of choice, keeping what works and carrying it forward, instead of doing impassioned rip-ups or switching to entirely new systems frequently