Recently tried to alter a phone plan on EE’s website, something that should have involved a few clicks. It was slow (literal seconds to open a page) and clunky. The Javascript console was bleeding error messages, and it looked like they’d used every Javascript framework under the sun. And after all that it just gave me an error message saying that the transaction could not be processed.
Gave up and texted (old school SMS) their help line. With a few text messages I was able to change plans. Probably used under 500 bytes to accomplish what the bloated and broken website couldn’t.