^.... this
Very very weeks go by that we don't have someone asking us all about where we got this or that piece of equip.. or how we handle this or that process... and probably 75% of the time it is someone with very little brewing experience. They have usually done "a couple extract batches" and "my family has some money to put into it". We had one guy who had done one batch at a BYO place and was then telling us about how he was going to hurry up, trademark a name, and start looking for space.
The running joke we have on the topic is basically an impersonation... "Yeah so... I put gas in my car the other day so I'm thinkin' I'm gonna open an auto repair business. Where do you guys buy your oil filters??"
I used to get super pissed and insulted but now I just try to answer the questions as politely as possible and wish them well.
It is amazing how many breweries are also starting out huge right out of the gates. They somehow get millions of dollars in their hands and just have at it, never having brewed anything at all on a commercial scale. If it works for them, awesome... but I couldn't fathom going that route personally. Given how competitive it is, it better be really solid beer from the first batch or you're going out of business REALLY quickly with a shti-ton of debt hanging over your head.
THAT is where I see any "bubble"... I don't see a demand bubble at all but I think a lot of these "just toss up a building and have at it!" Breweries are going to start falling by the wayside.