[arp242]

That's surprising! But I kind of get why they do that, as so many tools hard-code "gcc" rather than using "cc" or "$CC".

I'm not all that familiar with Java or Rust, but Go is very compatible; it's hard to predict the future, but it's already a third on its way to "35 years of compatibility".

JavaScript is pretty compatible as well; crummy JS from the 90s typically still works today (arguably it's compatible to a fault, with things like arr[-1] not being fixed).