In the sense of being marketed as a single integrated package, yes, I agree. I was using the term loosely to refer to the apps themselves (Word & Excel were the first two, as you note, the others came after).
It's quite possible that this attributes too much intentional strategy to MS, and also treats them as a single entity with a single strategy more than they deserve. The MS internal teams that were bending over backwards to maintain backwards compatibility were not the same as the teams that were churning out new APIs, building Azure, etc., and quite likely had very different incentives.