The beauty of UNIX to me is the interoperability of the text stream

What interoperability? Look at the man page for any simple Unix utility (such as `ls`), and count up how many of the listed command line flags are there only to structure the text stream for some other program. "Plain text" is just as interoperable as plain binary. "Just use plain text" is the Original Sin of Unix.

The Unix Philosophy, as stated by Peter Salus [1] is

1. Write programs that do one thing and do it well

2. Write programs that work together

3. Write programs to handle text streams because text is a universal interface.

The problem is that, in practice, you can only pick two of those. If you want to write programs that work together, and do so using plain text, then, in addition to doing its ostensible task, each program is going to have to provide a facility to format its text for other programs, and have a parser to read the input that other programs provide, contradicting the dictum to "do one thing and do it well".

If you want programs that do one thing and do it well, and programs that work together, then you have to abandon "plain text", and enforce some kind of common data format that programs are required to read and output. It might be JSON. Or it might be some kind of binary format (like what PowerShell uses). But there has to be some kind of structure that allows programs to interchange data without each program having to deal with the M x N problem of having to deal with every other program's idiosyncratic "plain text" output format.

[1]: https://en.wikipedia.org/wiki/Unix_philosophy