I think I’m agreeing with you whole-heartedly if I say that article’s conclusion is at best extreme and unrealistic when it says “the parsers need to be fixed. They should support extracting any numeric type we want from JSON numbers and at any precision.”

This sounds like an unreasonable position to take. “Any” is an unachievable standard that could require an unlimited engineering budget with no demonstrable value in practice.

It is good to identify the lack of a standard, and to talk about what parsers do in practice, and good to discuss the gaps and unmet use-cases. It would be a good idea to suggest that there should be a more reasonable standard, perhaps. It’s just not a good idea to demand that everyone support “any” possibility when no one really needs that, no one knows what it means, and it’s not actually possible to achieve.