What's "sustainable" is probably subjective. To my mind, it's these characteristics: 1) being able to write or dictate from any device 2) accessible in future 3) assists with recall 4) uses formats that can be read decades later even as technology around it is constantly changing
2) and 4) make any kind of third-party service/SaaS a no go. Otherwise, you'll have to set up periodic export to a preservable format, which acts as a speed bump. If the service becomes popular, it may attempt lock-in by throttling export features.
For now, I'm using Obsidian. It's accessible from all my devices. Because it uses markdown, the notes will remain accessible even if the software dies. It supports searching but I can also search using any search tool.
Additionally, I use Anki flash cards and its spaced repetition features to recall key info. I link them to my notes in case I feel like delving deeper into a topic. Unfortunately, because Anki uses SQLite locally and its own closed-source server for syncing, it doesn't satisfy many of my criteria. For now, I've set up periodic exports until I can find a sustainable alternative to Anki.
2) and 4) make any kind of third-party service/SaaS a no go. Otherwise, you'll have to set up periodic export to a preservable format, which acts as a speed bump. If the service becomes popular, it may attempt lock-in by throttling export features.
For now, I'm using Obsidian. It's accessible from all my devices. Because it uses markdown, the notes will remain accessible even if the software dies. It supports searching but I can also search using any search tool.
Additionally, I use Anki flash cards and its spaced repetition features to recall key info. I link them to my notes in case I feel like delving deeper into a topic. Unfortunately, because Anki uses SQLite locally and its own closed-source server for syncing, it doesn't satisfy many of my criteria. For now, I've set up periodic exports until I can find a sustainable alternative to Anki.