The stack matters far less than founders think, and the wrong way it matters is almost always the same: a clever choice that makes every future change expensive. We have shipped 75+ products, and the ones that moved fastest ran on boring, well-understood tooling that any competent engineer could pick up.
Optimise for three things in this order. How fast can you change your mind. How easily can you hire for it. Can someone maintain it after you. Novelty fails all three. A bleeding-edge framework is a bet that you will be the team that scales it, before you have proven anyone wants the product.
There are real cases where new tech earns its place, on-chain systems, AI-native data flows, genuine real-time scale. We build those. But you adopt the new piece because it solves a problem you actually have, not because it looks good in a pitch deck. Everything around it stays boring on purpose.