I have a full app very close to public launch that makes nested lists and checklists easy and powerful. It's a personal app I've used for years and finally decided over covid to turn into a true product. I'm garbage at fundraising and have 0 wealth in my network so I'm just bootstrapping as best I can... but nested lists are insanely powerful, I'm probably in the 1% of high context switching costs, context switching is absolutely painful for me which is why I built this for myself, easy, fast structure means I can live in the structure of what I'm doing and by always knowing my place it transforms many "context switching" events in my brain to simpler "working the next task node" events which has insanely less cognitive overhead for me. It's the only productivity software that has helped me do more.