Choosing the right tech stack for a fast-scaling product

We’ve just closed our seed round and are scaling fast, which means we need to decide on the tech stack that will last us at least a few years. Picking the wrong one could be costly later. While researching, I landed on this website https://tech-stack.com/
where developers share insights about which stacks perform best under rapid growth conditions. It’s crazy how many opinions there are — some swear by Node.js for flexibility, others recommend Go for performance. Our biggest challenge is balancing developer familiarity with future maintainability. We’re also concerned about the hiring market — finding good engineers for niche technologies can slow down growth dramatically. I’m curious what you all think: when scaling a startup, do you pick the stack your team knows best, or the one that fits long-term technical goals even if it means a steeper learning curve?