You must be living in some alternative universe. What I typically come across, even in fairly young companies, is tech debt ridden, buggy, endless cakes of layer upon layer of mostly cruft with a spiffy looking front thrown over the whole. Pretty icing on a crappy cake. As soon as you lift that top layer the illusion crumbles. I'd be happy to bet that most companies that run services out there would not survive a hostile audit of their code and systems.