If your company goes out of business because you spend time re-architecting then you're doing it wrong. The thing with stuff like Rails is that we don't need mo

If your company goes out of business because you spend time re-architecting then you're doing it wrong. The thing with stuff like Rails is that we don't need money to start quickly. They are amazing for validating a business idea and doing fast iterative agile development which is the core to building a successful startup. Once you've done that and have either cashflow or serious funding you can afford to pull out some functionality into separate services with more appropriate architecture etc. For what most MVP's are, tools like Rails are very good as they optimise for build speed. Clearly they can't do everything and shouldn't be used for some things but for most web things they are a solid choice. Companies that optimise prematurely are far more likely to go out of business.