Strictly following MISRA like guidelines while developing web SaaS? Spending day on orchestrating mocks of this and that service so you can test some trivial class and tick the 100% code coverage box?
I think that code quality of individual methods does not matter as much as quality of overall architecture and that requires some design planning and regular refactoring and that I would imagine can hold you back from delivering something in a tight time frame. It does pay in longer term, I am not debating that, but before it pays off it may be too late.
Greater Los Angeles has a lower population density than Germany or the UK. It's densely populated for a country, not so much for a city. The County of Los Angeles is somewhat denser at about twice the population density of England. Los Angeles itself is fairly densely populated, at slightly below the population density of London, or 1/4th that of Paris (a city known for resisting skyscrapers).