The demise of Pascal is IMHO mainly caused by Borland sticking to it's GUI way of working, while its customers moved on to the Web. Borland never had a really attractive offer for server-side development.

Why is Pascal no longer used?

The original Pascal had to be extended in order to "scale" for greater projects (i.e. no notion of modules/units, etc.). Implementations extended Pascal to acommodate the needs of application development. As mentioned: by Philip this lead to fragmentation.

Is Pascal programming dead?

Yes, you can still do Pascal programming in it, but few people do; in fact, you can use Delphi to build for many different platforms including iOS, Android, and, soon, Linux. ... So, Object Pascal is dead.