Back in the 90s we hit a massive wall on three fronts using Smalltalk: collaboration between developers (no file system to share code); no change control; deployment to users (stripping down images to make applications).

We had a pile of hacks but integrating changes took all the productivity of Smalltalk away.

However, tools like Envy/Developer fixed a lot of it. It still didn't fix everything but at least sorted code integration and source code versioning. Not sure if the product still exists though.

I loved using Smalltalk but in a team environment its useless and keeping your code disentangled from the underlying environment is a nightmare.