I am bit older than average so I used Delphi in its golden days. Even today few of the old customers need old apps maintained so I keep Delphi 7 ready.
When it comes to quickly developing native line of business applications (the niche between excel spreadsheets and commercial off the shelf) I've still not seen anything that can beat Delphi, the .Net stuff has gotten very good.
Delphi is quite good, but I really truly think it killed a lot of careers: Many of the people that I worked with on a Delphi project late 90s/early 2000s just never let it go, and their job prospects collapsed to the last few residual shops still using Delphi. I suppose this happens with all technologies (e.g. some people clutch on and make Cobol their lifetime effort, etc), but every time I see a Delphi advocacy piece it makes me a little sad remembering the countless emails looking for possible Delphi engagements.