Thanks for the heads up.
Wouldn't have actually known to update if I hadn't seen your post.
Have auto updates turned off.
Looks like a bunch of bug fixes and the much touted Apple Music, getting ready for the big update iOS 9 in the fall. Doing the 8.4 update on my iPhone 4S at the moment. Shouldn’t bring any devices to a crashing halt hopefully. Only time will tell I guess.
Just added: The 4S updated just fine. It didn't melt or phase out of existence. Whew! No real changes at first glance, new "Music" App in place of iTunes. Probably more changes under the hood. Phone works just the same.
Now to update the other iToys and interface with the DL.