This seems similar to how macos has bash, but it has ancient bash. Allegedly the reason is that Apple is fine with GPL2 but not GPL3.
Though at that point I kinda wonder why they bother shipping bash at all, when their default shell is zsh, and it's entirely possible to have system shell scripts run by the BSD-licensed dash, rather than bash.
There's probably also something to be said about the choice of running ancient GNU make rather than BSD make, but I don't know enough about the differences to say it.
so for all intents and purposes, it's a different make than what most people think about when they say gnu make.