I tried Lazarus recently, but I found the IDE to be slow.

I have not tried the IDE, but I like FreePascal. The compiler is fast and it has great multiplatform and cross-compilation support. In particular for older platforms.

It feels more stable and mature than most other languages. I do not know if there are enough developers keeping it alive, but hopefully it will mostly get bug fixes and ports to new platforms. Better if they do not mess with the language or standard libraries. Those that want a programming language that keeps breaking backwards compatibility every few months have plenty to choose from already.