Alert system should be upgraded to pop up a dialog box every 30 minutes whilst you're using the software.

Bitcoin is one of the few pieces of software I use that has no concept of automatic updates or even notifications at all. Yet the network badly relies on people upgrading for stability, scalability and to enable new features.

If the alert system goes away, it'd just end up being replaced by polling something over HTTP, which is less decentralized than before. Having zero way to communicate upgrades to end-users is a non-starter for anything serious about mass market penetration.