I don't know....FOSS tools have their advantages, and I don't think it's unreasonable for FOSS developers to ignore proprietary tools, even high-quality ones.

I don't know....FOSS tools have their advantages, and I don't think it's unreasonable for FOSS developers to ignore proprietary tools, even high-quality ones. I think the advent of affordable and later FOSS alternatives to Lisp and Smalltalk during the 1990s when the cost of Lisp and Smalltalk development tools were generally high helped hinder the adoption of Lisp and Smalltalk, and these communities are still dealing with the effects of this; while there are high-quality FOSS implementations like SBCL and Pharo, respectively, they have to compete with the likes of well-funded languages like Java, C#, and Python. Even newer languages such as Rust and Julia have had rather prodigious growth. In addition, no major company is backing FOSS implementations of Lisp and Smalltalk like how Python and Rust are being backed. Perhaps one of the big keys toward broader adoption of Lisp is for a large corporation to embrace Lisp and to participate in the FOSS development of the Lisp ecosystem. Unfortunately it is hard for companies to solely focus on developer tools since they have to compete against FOSS offerings.