Earlier quoted context omitted.
It's more hilarious because his response to that (basically, "this is tax software so there will be a lot of QA when we make that change") is at least sort of legitimate, but only because his accounting software evidently only works due to undefined corner cases in the underlying platform, and that's just ... wow.
One of the hidden costs when you elect to use a language like PHP in the early 00's is that as they fix the glaring issues in their language and stdlib you will be incurring a continuing maintenance cost. It's a combination of your choice to pick PHP and their choice to fix the languages warts colliding. It may even have been a reasonable choice for reasons of time to market, hiring, and other business related factor…
But focusing on PHP is rubbish - you can look at any language and find questionable choices. The moment where we need frameworks to make the warts go away - that's worrying. Same thing with JS really