[cxr]

The problem with this argument is that it demands we apply a false equivalence. The key word in your comment:

> hacks

Flash was not standardized. Same with IE's proprietary recommendations (and Mozilla's for that matter—XUL is proprietary, even though people often use "proprietary" as an antonym for "open source"). Most of the "web features" that people have in mind are in the same boat: experimental and draft-level proposals that eventually fall by the wayside for one reason or another. The Web is actually the single most successful attempt at a vendor-neutral, stable platform that exists. It's why we're having this conversation now.

The argument is that, because some people did something hacky or bleeding edge and then bled from it, then there's no real point in any amount of stability, so we should punish everyone. What a double whammy that would make for! First, you spend all your time taking care to do things correctly, so you pay the penalty inherent in that—what with moving more slowly than all those around you—and then someone decides, "ah, nevermind screw the whole thing", doubles back on the original offer and then breaks your shit? I can't say I'm able to abide by that. Imagine all your friends getting drivers licenses and receiving a bunch of speeding tickets for their recklessness, then one day you get pulled over and ticketed, too, regardless of the fact that you weren't speeding.