Woah, this is exactly what happened with me too! Back in 2001 I wrote a security app with Delphi and launched it as a side product. Borland got sold and Delphi became expensive, dotnet became a thing, and the rest was history. Several years later, I'm on the 3rd generation of that security product, cross platform with dotnet core, and I've finally quit my day job to work on it full time!
I enjoy working with dotnet and Rider, but I have fond memories of working with Delphi. Compile times were insane, the RAD tools were great, and the IDE just flew - might be rose-tinted glasses, but I don't recall it ever crashing or being slow in any way.