The recent inflation vulnerability - what measures have been taken so far to limit the damage if a similar severe error occurs again?

Do you still remember how severe event it was? I'd love to hear the details of current preparation for the worst case scenario.

​

In addition - two ideas below (focused on a client software):

• The old signaling system was removed from Bitcoin, because it was a security risk. But wouldn't be useful to have a signaling two-states flag in the client software, which can be activated when rapid upgrade is recommended? The only information sent would be represented as a binary state: 0 (normal state) or 1 (severe risk, upgrade your client ASAP). Which is something totally different from the old messaging option. This way you have no way of sending to users anything that could guide their actions.
• Another (well known...) idea is to support and promote the development of alternative clients, which of course agrees on the same set of network rules.

​