Maintenance for the week of July 20:
• NA megaservers for patch maintenance – July 20, 4:00AM EDT (8:00 UTC) - 12:00PM EDT (16:00 UTC)
• EU megaservers for patch maintenance – July 20, 8:00 UTC (4:00AM EDT) - 16:00 UTC (12:00PM EDT)
As far as I know, there is no limit to the number of caches you can accumulate. It's undoubtedly stored as an integer value of some size, but no idea what that size is. That's an under-the-hood thing, but even a byte would allow 255 caches.
I'm fresh out of outrage, but I could muster up some amused annoyance if required.