No, Turbo Pascal was very successful, and its successor, Delphi, was wildly successful on Windows (Delphi was first released in 1996). It only started to falter in 2003-04 when Borland decided it wanted to be an enterprise Java company (???) and Anders Hejlsberg, the chief Delphi architect, left to go to Microsoft, where he was the chief architect for C# for .Net, and now works on TypeScript.