I am, as they says about Unix: Always changing, yet never changing.<p>I'm still using much of my original stack. The trick is not to chase fads and focus instead on core skills and technologies.<p>I've been using a Unix-like operating system since my first contact with SunOS, I've been developing in Python since version 1.x, C since Borland ruled the DOS world, JavaScript since it first appeared in Netscape 2.0 and Java since I saw the first applet (Java 1.2, perhaps?), PostgreSQL since, I dunno, whatever version shipped with Red Hat 5.0.<p>Of course I reserve the right not to mention my previous experience with Delphi, TCL, Symbian, J2ME, or (increasingly) Perl, if it suits me. Selectively forgetting no longer relevant technologies is a very useful workaround.