What are your challenges when coding a SaaS?

Hey everyone, I am Jonathan the founder of https://supastarter.dev. It's a boilerplate for SaaS apps built with Supabase and Next.js. The goal is to solve the most common challenges when building a SaaS so you don't have to and can focus on your business. Currently it includes the following features: - Authentication - Internationalization - Mail templates - A blog - Subscription (coming soon) - A landing page template - Dark mode - Responsive components - Serverless architecture Now my question to you is, what are the challenges you are facing when coding a SaaS? Are there things I didn't consider or didn't solve the way you would expect to? In general I would love to hear your feedback on the project and how I can optimize it! Have a great day!