Every talk about D here seems to transform into "why D failed?".

I don't use D.. I find Nim helps with even lower ceremony. That said, it's hard for me to understand how "getting into gcc" is failure. The list of such PLangs is very short. People can be very parochial, though. They probably mean pretty shallow things (just one example, but something like "failed to convert me, personally", or "jobs I'd like to apply for", or etc.).

Maybe people should instead talk about how they use D or what they'd like to see added to D? In an attempt to be the change one wants to see, I'd say named arguments are a real win and there seem to be some stalled proposals for that in D last I checked.

Maybe because there were some expectations when "The D Programming Language" was published back in 2010, regarding where D would be 16 years later.