For C# at least every version is at least better than the previous. 2015 was the big Roslyn makeover so I suppose I can accept a few more regressions than usual. But feature-wise, each version has had at least one killer feature that made the previous seem dated on day 1. Examples: edit-and-continue, or lambdas in watches.
Yeah like when they removed macros /sarcasm
Sarcasm notwithstanding, that was a terrible decision that still annoys me almost daily when I want to automate a repetitive task in the text-editor.
This has been the case for C++ for a while now. Every version of VS has gotten worse since, IDK, 2006 or something (and that's ignoring how long it takes them to finish new versions of the language). I had a suspicion that they had moved their A team over to work on C#, but hearing this... maybe they're just getting worse.