"What is holding back Smalltalk?" may or may not be a legitimate
question. However, the question is somewhat relative to the audience.
On a Squeak mailing list, the answer to this question is
straightforward: there is nothing holding Smalltalk back.

It would be more interesting to survey a general population (of
developers) with both specific and open questions. This would also
increase the "brand awareness" (Squeak and Smalltalk in general). A
survey passed along to colleagues, teachers, classroms, etc., would
certainly generate more interest, at low costs, and yet the compiled
data could outline the "failing" aspects of Squeak or Smalltalk in
general.

Anyway, it's just some thoughts...

Ian.