[jessep]

Seems like it makes sense to me. Here's an analogous situation to jquery:

X = a huge workshop with a million tools, a table saw, ladders, and yes, a hammer and some nails

Y = some nails

Z = a hammer

You need to hammer stuff as part of your job. Yeah, if you get rid of X you need to replace it with Y and Z, but it still seems like simplifying to me, if you're replacing a whole room full of tools with just the tools you actually need.

[alextgordon]

The workshop is free to use (it's on Google CDN), but the hammer and nails cost money. Seems like a no brainer to use the workshop.

If the hammer and nails were actually better, then fine. But there's nothing actually wrong with $.ajax, that I can tell.

[Kiro]

Why would you need the workshop if you're not going to use any of it except one thing?