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Re:Shopify invests in research for Ruby at scale by igouy on Wednesday May 18, 2022 @12:18PM (#31424587)
afaict Self and Dylan were research projects / product development projects.

Smalltalk had multiple commercial implementations and was used to build mission critical software in banks and utility companies and manufacturing companies and…

https://www.davethomas.net/papers/ubiquitous1995.pdf

Re:Shopify invests in research for Ruby at scale by pjmlp on Thursday May 19, 2022 @03:16AM (#31431657)
Apple sold Dylan to Harlequin, which sold it as a DylanWorks for some time.

Smalltalk still has commercial implementations, like Cincom.

https://www.cincomsmalltalk.com/main/