Forth isn't suitable for large systems or large teams. And Smalltalk has a "image" problem.
However both of these are wildly popular. They slot into existing systems, making them easy to pick up and use.
I don't think there is a technical problem with images (which I think is what you're hoping to pounce on and debate ad nauseum), they just demand the rest of the ecosystem be built around them. This seems to be a trick you can get away with once per computing industry. Lots of people have come up with better image structures/concepts than hierarchical blobs of binary data, but they never seem to get significant traction because they are closed.
I'm just trying to untangle the different things you might be talking about - whether you're talking about development tools or run-time monitoring tools?