Can't answer for webdev, but for anything else, python and c++ with some mature library packs (boost, qt, eigen, scipy etc). They are not 'dated' in that tey don't have any expiration date. As N.Taleb points out in Antifragile, the best predictor of an idea's remaining lifetime is its current lifetime.
I like to think of C++ and Python as of concrete and wood: if you are to build houses, you better know concrete and wood. There are more fancy materials and prefab assembly, true, but these are better left for quick and dirty work for now, and used by people who already know concrete and wood.
It's sad Object Pascal has died, it was a good language with good history. C# has some of its legacy, I'd use it more but last time I checked, Mono still has severe performance problems.
