I would think the more fundamental question is -- are these 32 (or 303) different versions so non-backward-compatible that the need to test on all of them is just an accepted thing out in Node.js-land? That everyone just kind of shrugs and puts up with (the way MS Windows used to crash on a near daily-basis for nearly everyone, not too many years ago)?

I know that other languages also have issues in this regard -- but for more mature languages it seems to be more an exception than than the rule (restricted to certain platforms of subsystems, say).