The problem is that this requires work and validation, which no beancounter ever plans for. And the underlings have to do the work, but don't get extra time, so it has to be crammed in, condensing the workday even more. For hobbyist projects it's even worse.
That is why people are so pissed, there is absolutely zero control over what the large browser manufacturers decide on a whim. It's one thing if banks or Facebook or other truly large entities get to do work... but personal blogs and the likes?