Why would a new startup want to add another factor of uncertainty into building their product? If you want to prototype fast, you use whatever your technical si

Why would a new startup want to add another factor of uncertainty into building their product? If you want to prototype fast, you use whatever your technical side is comfortable with, you don't pick a new tool where you don't know how or even whether you can do your thing. Personally, the only real user segment I see for a proprietary language built by a startup is hobbyists and language enthusiasts.