I used to be similarly pedantic when parking the 787. At some airports, the Stand Guidance System would proudly display “787-900”.
I would tease the co-pilot, asking him/her to request a marshaller, as we were in a different model;
the 787-9.
But back to the subject of this post. I spent 14 happy years and about 9,000hrs as a co-pilot on the -400 and am very sad to see them go. That’s 36,000 engine-hours with only one incident; when one of the RB-211s didn’t quite produce enough EPR on take-off, which was then rejected.