Anyone who does not understand that the internet of today is not the internet of 1996 or 2000 or even 2005 is - Well, good luck. The internet has become commercialized (I call it "Wallmartization") and "Mom and Pop" sites (aka "small businesses") are on their way out the door. The Gold Rush is over. And I've read posts here where some people have over 100 sites.
My recommendation is to consider alternative income sources. Anyone depending upon Google for their income these days (especially AdSense) better be good at it (which, if someone has 100+ sites up is, I assume, well versed in the "trade" and is counting on many small profits).
My main site "died" almost over night and stayed "dead' for 2 weeks. It's coming back now, but not anywhere near its peak. But, to me the extra income is nice, but not necessary since I'm retired anyway.
I do wish all the "Mom & Pops" well, but I think they're headed to extinction just like when Walmart comes to town...