I'm having fun with django + htmx and going to deploy on elastic beanstalk.

It hits that sweetspot of speed of development and responsiveness. You also have the benefit of staying in one language.

Django has so much out of the box that you don't have to decide for yourself after the fact. So much accumulated knowledge of what works too.

Sure go ahead rewrite it if it starts making money and you can afford development time/salary. But these older technologies are easier to fit inside one head and let you get enough speed to take off.