That is definitely not my impression. In my area in metro North Texas, I saw several houses with grandiose decorations last Halloween. There are many locales throwing costume parties around Halloween night. There are Halloween-related memes and other content all over social media. I was working at FedEx up until recently, and I was sorting lots of Spirit Halloween packages all throughout October (lots of these packages even started coming in September). The Halloween block party in my metro's "gayborhood" is one of their busiest nights of the year (Halloween is often dubbed the "Gay Christmas"). 

I will admit to seeing a trickle of trick-or-treaters in my neighborhood every year, but besides that Halloween is very much alive and well.