I was literally going to craft a file and plop it on my site until I hit the "required expiration". I understand why it is there but think it should be optional. I think a better idea would be to steal from DNS and use TTL and serial numbers (maybe just standard http last-modified is enough?) - the point is "this stuff might be stale, reprocess it".

The last thing I need is one more thing to have to remember and update.

By the looks of it, a few others feel it is non-critical and have just skipped it too.