Ada was first standardized in 1983. It's one of the youngest mainstream languages. It's target market isn't the technobabble du jour, so you probably wouldn't make it your first choice for your Pinterest clone startup. However, if you're interested in building industrial strength applications (thinks like the targeting computer in a cruse missle), with lots of programmers, that has an application lifespan of years or decades instead of months, it's very well supported by libraries at all levels. It does interface with C, and does have good debuggers.