Even if it had stopped in this bacteria, and it sounds as though there is nowhere near enough evidence to make that claim, it doesn't mean it cannot start again

Even if it had stopped in this bacteria, and it sounds as though there is nowhere near enough evidence to make that claim, it doesn't mean it cannot start again. Evolution is an event driven process and given there is time between events, there can be a long time between events. And if there were no possibility of time between those events, everything would look like the end of Akira.