Cambrian explosion is probably not a good example because one of the reasons (correlations) was oxygen levels and other planetary chemistry shifts. I mean yes,

Cambrian explosion is probably not a good example because one of the reasons (correlations) was oxygen levels and other planetary chemistry shifts. I mean yes, rocking the boat should probably restructure life in a more sophisticated way (like shaking a cup of screws makes it fill more gaps and settle better), but if the previous bacteria went extinct without these changes, that explosion could be unremarkable.