[eCa]

I would think that the number of big sites that is/were built on Perl (IMDb, Amazon, ...) would be a counter point to that.

Of course, it's not the right tool for everything - far from it - but it is a Swiss army knife.

[SimHacker]

And the number of companies still using COBOL and FORTRAN prove what? As Dr. Turing's proof demonstrates, they're both swiss army knives too.

[ufo]

The Church-Turing thesis is not a proof - it is a definition of computability. (The thesis is that it is the reasonable definition. For all I know someone could come up with a new kind of computation that is stringer then turing machines and then we would have to redefine our notions.)