A startup is mostly about managing risk. Assuming that your product is SaaS (i.e. your customers don't know or care what is written on), then in general the ris

A startup is mostly about managing risk. Assuming that your product is SaaS (i.e. your customers don't know or care what is written on), then in general the risk that your product will not be successful is probably bigger than that it is successful and you have problems with an acquisition. I would worry more initially about what you can be the most productive on and also whether you have access to talent for that particular stack (to grow the team if it starts to take off) If you are truly successful at some point you will need to rewrite and you can change to a different stack then if it makes sense (it will be painful, but hopefully by then it means you will have the resources to do so)