Microsoft did kill off or sunset some parts of the Framework. WCF, WWF, AppDomain, expression trees, dynamic, VB.

People who wrote WCF services in VB for a living are probably extremely disappointed.

Disappointed? Not at all! I worked with it many years ago.

Whilst WCF made some notable improvements over what existed within the ecosystem before it, it was still a sprawling, complex PITA and full of developer friction. Killing it off in this case was definitely the right thing to do :-)

Do you have anything to support that expression trees are being sunset? I haven't seen anything of the sort, unless you are talking about a deprecated library that has been replaced. But System.Linq.Expressions is still around.

I've also seen nothing about DLR being removed