> An order of magnitude "or more" is an extraordinary claim. The evidence just isn't there.
Let me clear: I am claiming that these kinds of productivity gains are possible, not that using Lisp will automatically give you a 10x improvement under all circumstances. And yes, I can give you concrete examples of demonstrable >10x productivity improvements which resulted in products succeeding where they otherwise would undoubtedly have failed. These are generally found in niche applications where there is a lot of domain knowledge that needs to be brought to bear. So you're not going to see big wins in, say, commodity consumer products, which is the reason that the wins don't get much press. But the evidence is definitely there if you look in the right places.
Let me clear: I am claiming that these kinds of productivity gains are possible, not that using Lisp will automatically give you a 10x improvement under all circumstances. And yes, I can give you concrete examples of demonstrable >10x productivity improvements which resulted in products succeeding where they otherwise would undoubtedly have failed. These are generally found in niche applications where there is a lot of domain knowledge that needs to be brought to bear. So you're not going to see big wins in, say, commodity consumer products, which is the reason that the wins don't get much press. But the evidence is definitely there if you look in the right places.