There is an excessive amount of focus on speed, when it comes to building startups. One of the advices that is often provided to startups is to get out of the blocks really fast.
The #FailFast philosophy has probably pushed more startups towards failure than towards success.
If you were building a house, would you want the foundation to be laid really fast? Or might you prefer that time is taken to ensure that the foundation is really solid?
A business is a marathon, not a sprint.
You can get out of the blocks fast; but then, what is going to keep the customers coming back to you? Continuously making yourself better is critical; that is what keeps them coming back. Customers will stay with you when you delight them, keep offering them something better and better to look forward to.
You get paid for showing up and making the product/experience better everyday.
A fast start is like a spark, continuous improvement and delivery is the fire.
Keep the fire burning.