Earlier quoted context omitted.
> JQuery has just set a time limit on proper web access for an entire OS. What time limit? The blog post says jQuery 1.9 will be supported even after 2.0 is released, and that the two APIs will be the same.
If you look further into my comment you'll see I mention when 2.1 comes out. I doubt they will be back-porting 2.1 features into 1.9, and thus the time limit.
I'd also like to point out that this concern only comes into play 2 years from now. We are not intending to drop support for oldIE forever, but we do want to make jQuery smaller and as efficient as possible in the newer browsers, and leaving all the oldIE code in as we progress past these browsers wastes time.