Author here. Yes, that's really what it is. I need to make one that's actually feature comparison more than phrasebook.
We're also working on a GNU grep vs. POSIX grep vs. BSD grep phrasebook.
We're also working on a GNU grep vs. POSIX grep vs. BSD grep phrasebook.
For example, the table could show the blank cell in a different color if it is a default feature, or if it an unsupported feature.
Alternatively, the cell could contain a message such as "(default)".
Right now we're keeping all the data in a JSON file that we massage into a chart. Massaging it into a true feature comparison chart, along with a rosetta stone, should be a simple matter of programming. Same thing with the GNU/POSIX/BSD rosetta stone we're working on.
https://github.com/beyondgrep/website/blob/dev/comparison.js...