Smallltalk is a dream language. It's tooling, syntax and productivity is years ahead of anything.
Take for example the Swift language. It's great, yes. But when you see ppl admiring the interactive playground: this is the Transcript windows available on Smalltalk 20-30 years ago !
People who had to maintain complex financial systems would disagree. They were slowly migrating to, IIRC, Java.
Do you know what is the main novelty of last version of Java? Yes, "lambdas", available on Smalltalk 30 years ago from day-one.
Their reasons were maintainability due to static typing.