The hard part is not writing the software. The hard part is convincing companies that it is worth the switch cost to change the software they use. Which means

The hard part is not writing the software. The hard part is convincing companies that it is worth the switch cost to change the software they use. Which means making it possible for customers to automatically transfer all the data they have already created with the old software to the new software with zero loss. It also means convincing the customer that the cost of learning the new software is worth it. And it means convincing the customer that having to deal with your brand new set of bugs, instead of the old set of bugs they have already learned how to work around or fix, is worth it. In other words, you need world class sales skills way more than you need developer skills.