[pjmlp]

Ada did not took off during the glory MS-DOS/Windows 3.x Borland days exactly because of Turbo Pascal.

Note that the Martin Odersky of Scala fame was one of the main developers of Turbo Modula-2, that Borland killed shortly thereafter. They were also rather quick to get rid of Turbo Basic (which I had quite some fun with).

With Turbo Pascal absorving the Object Pascal ideas from Apple, and some of the key features from Modula-2, there was not much left from Ada 83 that was relevant for MS-DOS programmers.

However nowadays between FreePascal, Delphi, and Ada, I would probably pick Ada, given its industry role, and besides Ada Core, there are actually other six vendors still in business.