The craft beer market is here to stay. It started in the 80's, but really took off in the early 2000's. There's been a massive explosion in the last 8-10 years. There are now a metric crapton of people who prefer beer with a lot of flavor and have developed an appreciation for a myriad of styles. Having women make this discovery has been a huge step in ensuring its longevity.
That being said, there are far too many beers in the grocery store these days. Don't get me wrong, I love the selection and options, but I'm seeing more and more old beers on the shelves. If, as a brewery, your beer is sitting on the shelves for months or, worse yet, is a NEIPA and is sitting warm on the shelves, you're in trouble.
Demand is high, but people are becoming more discerning and, as their palates become more experienced, the mediocre beers are being left to rot in the stores. These breweries will fall by the wayside. It's just natural selection. Seeing breweries close is as natural as seeing restaurants close. The great ones thrive and grow, the good ones hang around with a solid clientele, and the mediocre ones fail.
This is why opening a brewery now is a huge leap. 10-15 years ago, just making craft beer that didn't suck was enough. Now you need very high quality examples of the most popular styles or you need something else (great food, for example) to keep people coming back.
I've been to a number of breweries where I walked out with my wife telling me I brew better beers than they do. I've also watched those placed founder and fail. There's nothing wrong with that and it certainly is not an indication that craft beer is just a fad on its way out. There is a craft beer brewery bubble and that bubble is bursting for the ones who aren't up to snuff.