Everyone has to make his/her choice of technology and MailChimp has chosen PHP. That's perfectly okay. I know PHP, and I've used it to put food on my table. Lu

Everyone has to make his/her choice of technology and MailChimp has chosen PHP. That's perfectly okay. I know PHP, and I've used it to put food on my table. Luckily that is no more. I'd consider doing PHP again only if my wife and kid were starving. My advice to people stuck with PHP codebases - start changing the site backend first. Write everything not related to spewing HTML in a real programming language, and slowly limit PHP use as a simple template-processing tool that generates your app's HTML. Which is probably the only thing PHP is good for.