We need an improved version of StackOverflow that factor age of a reply (decaying points or something) and that groups similar answers with for same questions b

We need an improved version of StackOverflow that factor age of a reply (decaying points or something) and that groups similar answers with for same questions but at different dates. Several times when I search for something (say, how to do X in Ionic) I find a reply that is old and does not apply to the current version of the library.