Making programs concurrent is hard, especially if you don't have good support from the language. I, too, would hesitate before attempting to make a highly concu

Making programs concurrent is hard, especially if you don't have good support from the language. I, too, would hesitate before attempting to make a highly concurrent application in PHP, Python, or Visual Basic. And even then you're looking at considerable investment rewriting stuff that already works. Maybe it works out if the cost savings from being able to purchase fewer machines outweighs the rewrite and the risk of new concurrency bugs.