Hydrogen fuel cells could help power the AI revolution. But will it be enough to reverse Plug Power's fortunes?Plug Power (PLUG 1.26%) is a key player in the hydrogen fuel cell market, and the company proudly proclaims that it's "leading the green hydrogen revolution." But with mainstream adoption of green hydrogen likely a decade or two away, Plug Power seems like the belle of a ball that hasn't happened yet. Unfortunately, Plug Power has been a wretched investment. Since debuting as a publicly traded comp ...