You could still isolate the changes that cause a problem, and it would still be reversing state in chronological order, but there might not be a one-for-one map

You could still isolate the changes that cause a problem, and it would still be reversing state in chronological order, but there might not be a one-for-one mapping between builds and the history, because the history can change upon merge. Though it's perhaps possible to freeze a channel for each build version, but I'll concede that seems like a hack.