Smalltalk images were fine for one-person development of single programs. Not really very manageable for teams, and modular development though. Not that the

Smalltalk images were fine for one-person development of single programs. Not really very manageable for teams, and modular development though. Not that these things couldn't be done - we certainly did it at IBM, when SmallTalk was the "thing" there for a while - but it never was very satisfactory. A lot of developers significantly younger than me seem to think that source code control was developed in the the last couple of decades, but in fact we did source code control, modular development, and build pipelines way back in the 70s - mostly with home built tools, but the capabilities began to be built out as soon as source code left card decks for permanent residence and in place modification on rotating storage. And SmallTalk was at best hostile to all those techniques.