The hypetrain has no brakes...

Just the fact that you wrote your simple single page "contact us" website in React shows that you have no idea what you're doing, nor do you have any idea what the actual benefits of React are and in what situations it actually shines. You're just jumping on the React bandwagon for the sake of saying "I wrote it in React," and your decision to use React for that simple website is going to effectively increase It's development time without adding any additional benefits.

Each framework has its advantages and disadvantages. It's worth it to pay attention to these advantages/disadvantage, and choose the best framework to fit your needs. Don't just use a particular framework because it's the hot new craze. Use a framework because it's the right choice from a technical standpoint, and presents you with advantages that fit your application needs.

Want an app to sell to investors?
All aboard the hype train.

Block chain.... Check
Machine learning...... Check
Pwa..... Check