Everybody knows…
You can find implementations of feed parsers/builders in any language you can think of. Every serious site builder comes with . And if you don’t know what that looks like, you just need to read through 1314 of the spec. At least one of its creators helped with the design of Markdown syntax, so you can trust it’s as straightforward as they could make it.
Many things can be RSS
Most things in software-land look like lists; and all lists can be turned into a feed. WE even have a format for “feed of feeds” if you need to nest your lists.
We do need fresh protocols
The cost of implementing parsers and converters has dropped to near-zero now, making adoption (at least in theory) easier than it’s ever been.