Ask HN: Using a commercial language/compiler? What are your reasons?

In the 1990s, commercial compilers dominated the programming scene. Today, it feels like the opposite: open-source programming languages dominate the scene (or at least they dominate discussions on Hacker News). Some random examples of commerical compilers: PureBasic: Build compiled, cross-platform desktop GUI apps for Windows, Mac and Linux using a modern dialect of BASIC. All for the cheap price of $79 Ada: GNAT Pro: For building commerical Ada software (not GPL programs); the price is not listed on the AdaCore website which probably means very expensive ("request pricing"). Delphi: It's still alive and rich in functionality, but now mainly targeted at enterprises ($3000 for enterprise edition) If you are using a commercial compiler, what are your reasons for using the compiler/language? Is it because: - the commercial compiler/language is faster than non-commerical equivalents? - the commercial compiler has features or libraries not found in open-source versions? - the commercial compiler provides professional support? - the commercial compiler gives you a competitive edge to building software products (e.g. faster to construct) - the commercial compiler is tailored to your specific field or industry sector? - the commerical compiler provides you with comprehensive help or documentation?