Here's something we can all keep in mind: Caroll may not be able to make it to Season 50, but even before anybody even thought about a Season 50 - even before anybody thought about a Season 40, he said he wanted to stick with it until he physically could no longer . . . and he did. In fact, he stuck with it even longer than that: even as his physical capabilities deteriorated, he continued to dub voices as long as he could as well.
So yes, it's disappointing that Caroll has retired before we get to Season 50, but we should be thankful, grateful, and appreciative that he lived up to his initial goals to hang in there as long as he was physically able to.