[fedora-arm] uboot update frequency

During the F21 development, it seemed that uboot was very stable. That is only occationally was an update rolled in. This seems to be the case now in F22. The reason I am asking for clearification is that Hans told me that I can now boot from sata with only uboot on the SD card. So I can take an old SD card, put uboot on it and only change that when a new uboot is rolled in. I would pick up a couple sata drives cheap on ebay (back in the fall, I got 5 80Gb drives for $10/each and free shipping), and dd the partitions to them for testing. If uboot is updated frequently with no announcement, that only means that I build a new uboot SD card with each sata drive image. Just an extra step, but I would like to know about uboot updates. thanks (going to start shopping for hdd and ssd drives today)