i can say only one thing:

CTRL should be in the corner.

this!

We have a system that pushes loads of messages (as in thousands a minute) and some consumer insists on using there http backend to push the messages to. There system is down every once in a while for quite some time. We're using an async queueing solution, but you can't keep those messages forever. We sometimes have milions of messages for them in there queue's, which take up space... If all of our consumers had those problems we would have to buy loads of storage.. We're simply dropping messages older than x, and have an endpoint that they can call to retreive the 'latest state of things'. This way when they come back from a failure, they simply get the latest state, and then continue with updates from our end.. It's far from perfect, but it works really well.

I know the goal for most systems is just to be 'up to date' Not to get the entire history. So in most cases you don't need to stash all the messages, you just need to be able to retreive the latest state of stuff...