And we're not even close to it yet.
Which doesn't mean it can't happen again. One way you'll know we're headed toward bubble-land is when the skeptics and naysayers give up. Which is why it was good to see Groupon's IPO filing last week greeted with hard questions about the company's revenue trajectory, spending and debt.
That stuff just wasn't cool to talk about in 1999, not when there were "eyeballs" and "mindshare" to be had!