I still don't understand why people ask this question. It's exactly like you say. The technology stack does not really matter. All that matters is how productiv

I still don't understand why people ask this question. It's exactly like you say. The technology stack does not really matter. All that matters is how productive you are in the initial phase. You should always be choosing something you are familiar with, because it will allow you to get where you want much quicker. And yes, later, then you do actually build a business, you can start playing around with newer technologies. But only if they are valuable for the business.