What tech stack should I choose for a side project that might need to scale?

You'll probably end up rewriting a lot if your project catches on, so just focus on getting it out there first. Remember, the order should be: Make It Work, Make It Right, then Make It Fast.

A lot of the time, scalability isn't about the stack but how modular your code is. Keep the data, business logic, and presentation layers separate. This way, when you need to scale, refactoring won't be painful. Also, consider following the Twelve-Factor principles for easier scaling later.

Honestly, go with the stack you’re most comfortable with. It’ll really speed up development, and if it grows, you can always make adjustments later.

Forget about needing a massive scalable stack right now. Just get your project launched! If it starts gaining traction, you can always hire a team to help you scale it effectively.

Depends on your project, but I recommend starting with a stack you know — maybe React, Node, and Prisma. This combo lets you move quickly, and it's flexible enough to scale as needed later.