The IDE is just so far behind the competition. Crashing all the time an slow. Theming support ist very limited (to date). Delphi Code Insight ("Intellisense") is slow and sometimes just refuses to work and is generally not on par with other offerings. Error Insight (the wiggly red lines thing) is even worse. Delphi still uses a single pass compiler which makes for great compilation speed but seriously limits the language constructs.

The pricing is just out of this wolrd. You get the impression that they try to squeeze every last penny out of their existing user base.

People always say one of the main advantages of Delphi is programming of database centric (CRUD) applications but compared to the SAP system it's still inferior. I think the principle of RAD itself may be flawed/dangerous. Sure, for small CRUD Apps with a single window operating directly with the db components (Grid, and those "mapped" Fields) you will quickly have results and it will work. But for larger Applications that all falls apart.

The trouble I see for Delphi is that the whole eco system is rotten. In my perception there are only a hand full suppliers of components and libraries left. Some of those components are barely maintained and even worse documented. There is lots more knowledge and up-to-date examples available for C#.