All signs say that Drupal is booming. Job listings on monster.com went from 65 in October 2009 to 120 a year later; DrupalCon has likewise nearly doubled in size every year for the past three; and Drupal consultancies report a perennial shortage of talent.
This all seems familiar to some of us -- but not all. You see, many Drupal professionals are around (or below) Dries' age of 32. That means they were 16 or so when Netscape went public in 1994, signaling the start of the internet boom; they were only 22 when the tech-heavy NASDAQ exchange crashed in 2000, signaling its end. So many of these "average" Drupallers have no personal experience of the boom-and-bust cycle that took down dotcoms, and the CD-ROM industry before that, and arcade games before then, and so on.
These cycles are predictable as cold days in autumn. We don't know exactly when they're coming, but they're coming all right. Neither summer nor winter can last forever. (Ecclesiastes and all that.)
I've had the fortune of going through two booms, first as a tech journalist and public-relations executive during the dotcom boom, then as a real-estate broker during that bubble. (I got into both of them as they were starting and got out a little before their crashes. Make of that what you will.) Now, I'm not predicting a specific end to the Drupal boom -- winter may yet be far away -- but I'd like to give the warnings now that I wish I'd heeded back then.
I know this is an awfully macabre post to make at such a moment of joy and celebration in our community, but it needed to be said.
Anything to add to this list?