I have a question about why apps are updated and require specific versions of OS where would I ask this>
There is no site on the Stack Exchange network where you can ask such a question. The reason for this: it is a discussion-type question rather than an fixed question that addresses a specific problem and can be answered in a single answer.
Here is the rule for posting on the Stack Overflow site (and correct me if I am wrong, but this applies to all sites part of the Stack Exchange network):
You should only ask practical, answerable questions based on actual problems that you face. Chatty, open-ended questions diminish the usefulness of our site and push other questions off the front page. - Stack Overflow - Help Center