The proof that System 7.0 was rock solid was that the Read Me file told us so, on a skeuomorphic dithered rock:
@gruber 7.0.1. That was the one.
@ceolaf @gruber System 7.5.3 revision 2.0 was where it was at!

@fofer @gruber I take your point, but 7.5.x was a whole new thing.

These days, that would have been a whole new version. .

@ceolaf @Gruber

yes and then System 7.6.3 took it to another level 🙂