My dumerils boy is 9 now I believe, these are slow growers but he is substantially thicker than a few years ago. Very nice snake, good one to take out for guests as he's pretty chill and everyone loves the pattern.
Another great looking animal in your camp.
I like the variety and I can attest to late in life growth spurts with certain reptiles. I think that one will probably continue to impress you with growth for a little longer.