Thanks for the feedback! I see your point; we could make it clearer from the start that it is JS-oriented. I'm coming from that world, so it seems like I took it for granted.
Also re OSS positioning - I'm actually not aware of modern (but maybe I missed it), polished SaaS starters such as the paid ones that got really popular lately (e.g. supastarter, shipfast), so that's what prompted us into that kind of messaging. We'd like to create a community-driven starting point for developers of equal polish and quality.