@dhry #TickTick is a beast! Using it for several years and its one of the few I pay for, even if the free version would cover all of my use cases. Simple Tasks, subtasks, Eisenhower View, Calendar, priorities and so much more. But you can also have one simple list with one-liners... 😌

I use #Simplenote for super quick, instant notes (including a few "sticky" ones that I come back to on occasion to update), and #Obsidian for what I call "cold storage" of notes, permanent, detailed and on hand for reference any time I need them. Beyond that, #TickTick for task management. This is the result of almost two decades of attempting to simplify my life, fwiw. Linux and Obsidian will work, but best option would be their paid sync service unfortunately. It's cheapish though.