In just the past 20 years, knowing how to program in cobol, fortran and assembly language went from desirable by every major employer and a "great major" in school, to a worthy job, but with a chain to a desk and some really really old code to stare at every day. Database programming was the key to development riches. Its still valuable, but nothing like the opportunities of the 80s. Same can be said of C and Basic.
If you know everything there was to know about Novell networks and Lotus Notes, you could easily earn a living. Today, you better have expanded your skill set.
From Dbase to Clipper to ASP to PHP, scripting languages have built worthy applications on top of the network of choice of their day. The nature of scripting languages is that they always will be replaced by something better at some point. What happens to all those PHP apps in place today ?
No matter what the technology, language or platform, it has a limited shelf life and will use its position as "the Hammer" until it loses it.
For the past 15 years, everyone who "gets it" has tried to use the Internet to fix or create whatever they think "the next big thing " is. How much longer until there is something new that comes along and makes Web X.0 on the net look old and tired ?
