Whether the people involved, or invested in it, like it or not, Yes it is.
I have answered manya lot of the "Blazor" tagged questions since it launched. The number of questions now asked are a trickle compared to say 4 years ago. The context of those asked has also changed. Most: most are now very specific, niche or about specific problem areas (where unless you can see the whole project you don't have enoughcustom security setups i.e. unanswerable without a lot of context to answer, some specialist odd framework knowledge, or a view of the question)project.
Where once I answered several a day, I probably only answerI'm down to say one every two weeks.
On the "Toxic" question: it still thrives. I had a perfectly valid answer marked down by lurkers last week. I've seen valid questions closed by people who didn't have the knowledge to judge the validity of the question in the first place. I've reported stuff, but never received a reply. It's quite a turn off even for a seasoned contributor who doesn't give a **** about points: I'm within a cat's whisker of joining the exodus and bowing outleaving the building.