[fatnoah]

As someone that had to handcraft client-side browser experiences in the early 2000's (think drag and drop, elements of single page applications, etc.), I basically had to write two versions of everything in order to support Netscape and IE. It was tremendously interesting because I was building things that you really didn't see out in the wild at the time. It was also tremendously frustrating dealing with DOM and feature differences.

It's hard to overstate the impact of jQuery. It more than doubled my productivity due to removal of much of the duplicated work AND the general streamlining of DOM manipulation. As someone who was also neck deep in XML and XSD, the element selection syntax also felt reasonably familiar and comfortable.