Reason to use older versions of jQuery? [closed]

Question

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 10 years ago. I just read this question about how to fix something in jQuery 1.2.6 and don't understand why people would use older jQuery versions? What benefits/reasons are there? To me I thought the answer was obviously to update to the newest jQuery, but there must be reasons why most of the responses don't say that. EDIT: I understand being....say one version behind, especially when a new version just came out.. but being more than say... 3 versions behind? I don't see how the effort of making something work in the newer version would be more than making future things work with the older version. Thanks! JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

Newer versions often new ways of doing the same thing and infrequently but do break backward compatibility. Sometimes, the sheer effort of regression testing (after upgrade) your site can be a deterrent. Also, if there are other third party plugins that rely on a older version, then until they upgrade, you can't.