I don't think the author has offered a great argument in this article. Building a new website in C sounds like a fun learning experience, but it's not a practical choice for the typical startup CRUD app.
When you're a startup, your biggest problem 99.999% of the time isn't running out of memory or not having a fast enough app, but getting an MVP up and launched and finding enough paying customers so that you don't run out of money. Except in specialized cases where your app is very CPU intensive, C provides a major headache without a major immediate advantage.
But C is a great choice for replacing parts of your app if you start growing and when you start figuring out exactly what services need to be faster and use less memory.
When you're a startup, your biggest problem 99.999% of the time isn't running out of memory or not having a fast enough app, but getting an MVP up and launched and finding enough paying customers so that you don't run out of money. Except in specialized cases where your app is very CPU intensive, C provides a major headache without a major immediate advantage.
But C is a great choice for replacing parts of your app if you start growing and when you start figuring out exactly what services need to be faster and use less memory.