We need e.g Linux basic tools to switch / start supporting web-ish data format - json as their output e.g

df -h --json

so we do not need parsers for every tool, but one coherent format which is already popular and has built in parser for every lang out there

Very interesting project that helps with that is https://wiki.freebsd.org/LibXo

Meanwhile, there is jc so that

jc df

returns JSON. See https://github.com/kellyjonbrazil/jc

Hope this helps.