I asked my kids (all software engineers) this same question about a year ago. My daughter said it was because class diagrams became too complicated for uml. I

I asked my kids (all software engineers) this same question about a year ago. My daughter said it was because class diagrams became too complicated for uml. I used to use uml class diagrams when coming up to speed on a new framework. I tried to do this recently and it was a nightmare. I used to use sequence diagrams for my own code - but that is difficult to derive from someone else's code.