(If I'm understanding correctly) one example is if have two places where you x++ in the loop, so if you make an error in there you might end up hitting both of them and incrementing from y-1 to y+1.

`<` communicates the intent way better. It also more readable

Example: The loop should run as long as the counter is smaller then 10. `i /= 10` achieves the same thing but communicates something very different. It implies `i` may be changed inside the loop to become larger then 10. The condition itself implies a larger valid state space.

Anyway it's a moot point anyway. Modern languages have much better looping constructs.

If you have a bug and produce x+=2, you never terminate?

One might argue corrupting much larger swathes of memory is better from a "fail-fast" perspective, but there's always tradeoffs.