I have been noting this issue on other purchases of multiples. Due to passage of time and repeated handling of some of these, is this a new normal?
Blocks have always fallen apart or been broken up. Block prices have not surged vs. singles prices so supply has kept up with demand. In fact, there's always been older PBs (like Columbians, Trans-Miss) bought with the intent of breaking them into components. The demand for those intact classic PBs is small, and their collectors are as condition-conscious as anyone.
In other words, is the time coming when this will be more acceptable?
I kind of doubt that. People are more condition-conscious than ever to the point of many ignoring and not acquiring certain stamps because perfectly centered ones are just not available.