What company/product were you most sad/surprised when it shut down?

If you're a minimalistic approach lover then you should definitely check Wunderlist. It's doesn't eat much resources if you keep it open all the time. Lists of tasks, starring tasks is the best simple and productive way of tasks' prioritization. It also has a great feature of adding a task or searching for a task without going to the main window. Just use a keyboard shortcut for this.

I've tried this app many times, but really fail to see what people see in it. It fails my basic use cases of even a grocery list, where I need to complete an item, have it hidden, then uncomplete it when it's needed again, easily.

But then again, Todoist also fails this. Perhaps these are great for one-time use and throw away items. I use AnyList, and would otherwise use Paperless on iOS (or now Ikiru) before either of those.

Why?