voriigkye
Re:Methods for Teaching the Programming Language Smalltalk (1977) [pdf]
on Sunday October 29, 2017 @11:36AM (#15579662)
14 years and counting working on a medium-sized company that uses Smalltalk only, to develop financial applications.
Also, 3 years and counting using Smalltalk to develop a commercial game rules application as a personal side project.