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I wonder if some of the laughing isn't so much at you and your stack, but at the laugher's experiences with those (or similar) technologies.

We've all worked with technologies that cause us pain in our development process. Sometimes, the pain becomes so great that we look for, and find, something that we like better. Changing to this new techonology eases said pain, and allows us to be (or at least feel) more productive.

I believe it's possible that some people laugh because they remember when they used one or more of those technologies, and the pain they felt while using it. They laugh and suggest other technologies because they assume you have the same pains they've had, and they'd like to offer you what they consider a better alternative that might ease some of the pains. After all, it worked for them!

It appears that you've had some pains with this stack, but that you've found ways to deal with those pains that don't involve leaving your current technologies. Good for you. You've built successful applications on them. Also good for you. These are, of course, the things that really matter.