Customers don't care what you code in. Or what your backend is like as long as it works. They just want their lives to be easier. Use what you know, use it well, and make a difference. --- Most techies who have a negative opinion about any technology do it with hearsay and not first hand experience. For examples, all web languages pretty much do the same stuff, and you'll rarely come across a web app that uses a lang…
You'll find that even when you have first hand experience, you'll often be met with "well, you didn't do it right". Or "you need to do XYZ first - no one ever does foobar with XYZ first - are you stupid?". And so on. Even first hand experience isn't enough for some fanboys when you choose to reject their tools/languages.