I think code that is continually edited and expanded over many years, with lots of changes to requirements, if managed poorly, can have a shelf life. But there

I think code that is continually edited and expanded over many years, with lots of changes to requirements, if managed poorly, can have a shelf life. But there's plenty of older code that will continue to work just fine essentially forever. I use plenty of older code that hasn't been touched and is fine. I also use libraries that have been continually improved that have been fine. QT isn't perfect but it's been around since '95 and I think that the modern state of it is pretty great overall.