"Look at the irony settings in our cover song... they all go to eleven."

"Oh I see. And most cover songs only go up to ten."

"Exactly."

Something that contributed heavily to my PVE guild (which did casual 10-man raids for lulz) and my standing raid crew (25-man, progression-minded) was the raid lockout system change they made going just prior to launching Cata. Those two groups of raiders overlapped by about 6 people -- people who enjoyed playing the same toon in both settings. The "flexible" lockout system killed this arrangement: any toon could only kill one boss -- be it in 10-man or 25-man groups -- one time per week. (Fail.) So our powerhouse players could not also help out in the casual guild runs. That the progression raids sometimes opted to extend lock outs into the next week to keep working a particular boss also contributed. So with players feeling like they were being forced to choose which groups of friends they wanted to raid with in any given week ... they chose neither. With the writing on the wall, the guild fell apart, cannibalized by Rift and LOTRO. And the same story happened with some of the remaining 19/25ths of the progression raid crew, leaving stragglers like me with no team to run 10's or 25's with in Cata. I cancelled my account as much by attrition as disinterest in 30+ minute queues to re-run the same couple dungeons each day as a filler. (But we expect we'll regroup as soon as SW:TOR comes out, if it's even half decent.)

One of my accounts also got a message from Brookstone a day or two ago.

One of the big reasons is that HTML lacks semantic meaning beyond simple paragraph constructs. Documentation-oriented markup languages (of which I'm more familiar with DITA) and schemas can seem arbitrarily complicated to a casual observer, granted; but having an identifier that clarifies "this" paragraph being an instruction that should be executed by the user, and "that" paragraph being merely an example can allow for some rules-based (automated) processing to exist between authorship and production that wouldn't be possible lacking some notion of the semantic purposes of a random collection of raw paragraphs.