>The company with the best track record of maintaining backwards compatibility in the entire tech industry owns Github. They also own TS, which seems to have m

>The company with the best track record of maintaining backwards compatibility in the entire tech industry owns Github. They also own TS, which seems to have major breaking changes each year and necessitate annual churn and refactoring of entire codebases. Windows having remarkable backwards compatibility does not mean the rest of their products do, too. EDIT: I could also bring up one of their other products, Lean, whose 4.x versions have so much breakage that mathlib has been on a community-maintained fork of Lean 3 for as long as I can remember.