Tech stack regret is one of the most common and most avoidable startup problems I see.
You pick a stack because it's popular, or because your first contractor knows it, or because you read a blog post about it six months ago. Eighteen months later, you're fighting against its limitations, your team has grown and half of them prefer something else, and the cost of switching feels prohibitive.
The factors that actually matter when picking a tech stack for an early-stage product:
Project requirements first.
Real-time data processing needs different technology than a content-heavy marketing platform. Match the stack to the product, not the other way around.
Team expertise second.
Building on familiar technology is dramatically faster than learning while building. If your first engineer knows Python deeply and only knows JavaScript casually, that matters.
Community size third.
Large active communities mean better documentation, more third-party libraries, more Stack Overflow answers at midnight. This compounds significantly over time.
Scalability and maintainability fourth.
The framework that's fastest to build on now might be the hardest to maintain in two years. Think one stage ahead, not just about the current sprint.
"Everyone is using it" is not a reason. It's data about popularity, not fit for your specific project.
Full breakdown on Foundersbar, including how to evaluate these factors for your specific product:
→ https://foundersbar.com/articles-and-research/top-strategies-for-effective-startup-software-development (foundersbar.com)
What's a tech stack decision you've regretted, and what would you change?