The automatic splitting of tasks is a great feature, but 15 minutes hurts productivity formost tasks - see research on "context switching."

Every time we shift the type of task, we lose time and focus while adjusting our mindset. So the shorter the block, the higher percent of our time is lost in transition. The shorter the window, the greater % of our time gets lost to context switching.

30 minutes is a much more effective minimum split size. If the total task time is 30 minutes, we really should not split that at all.

Of course we should still have the option to create a single 15-minute task that is not split.

Thanks for the excellent product!