This is really cool! You did a great job with this. I'm glad it's something you're actively using, that's the hallmark of a good product -- users :D

A teeny tiny nit-pick, the bottleneck diagram ... frustrates me. I think the intent is you want to depict the fact that different [classes of] users experience friction with various obstacles ? I don't know, I personally found that it took away from your otherwise very cool article. A live demo would add to the intrigue and fun aspect of your write-up, although I don't know if you are interesting in making a "massively multiplayer online dotolist" ;D

Todo-list apps are nothing new. You might think sharing a handful of editable tasks among a few people would be dead simple.

You'd be wrong.

To my knowledge, no simple tool of this kind exists. There are countless complex apps that want something from you and your collaborators — a subscription fee, registration, an email address, your smartphone's private data, permission to send you notifications, and everything in between.

So I built something my elderly father, wife, kids, and less tech-savvy co-workers can use instantly, without explanation from their phones.

The solution is deliberately minimal: just a URL per collaborator, opened in their browser (desktop or mobile) — no new tools, no new habits. The list is the single source of truth; ongoing communication happens through whatever channels they already use: chat, Messenger, email…

I built https://dotolist.eu for myself as a proof of concept — but friends quickly adopted it, and you're welcome to use it for free. It is NOT vibe-coded. It is love-coded in Clojure.

Let me know if you find it useful. :)