Absolutely, but the truth of your words is also the tragedy. Having engaged and demanding users might have positive externalities when these users demand things that improve the products in the market as a whole, and thereby improve the experience for casual users as well. But companies don't want to improve their products, or improve society, or improve experiences for users; what they want is to collect rent. An established company becomes more cost-efficient by embracing casual users and ignoring power users. An upstart company might want to leverage power users to compete against a well-funded opponent, but that debt eventually comes due as we see now with Mozilla.

At enterprise prices (i.e. thousands of dollars per user per year) it makes sense to accept the cost of dealing with power users. But not for a product that you give away for free.

I say this as someone who has been using Firefox for years, and you'll need to pry it from my cold, dead hands. I'm impressed that Mozilla has survived for as long as it has, I was sure they'd be financially kaput by 2016; at this point I think Google only keeps their search deal up as an attempt to avoid antitrust action. I don't know what the future holds for Firfox, but I hope it remains competitive. We need alternative competing implementations for the health of the web.