After-script where introduced recently and they are really good, but for cleanup it would be even better to have an "after-step" and by that i mean a final step or set of steps that would run no matter what happened previously in a pipeline.

I'll give an example that back this proposal.

Let say i have a step with an image that can creates an aws infra. Then i want another step with a python image that can run tests against the infra created in the first step. And at the end, i want to be able to destroy the infra in a third step, using the same image as the step one, no matter if the step 2 was successful or not.
With the after-script, the only thing i can do is run a script in my step 2 which dont have what it needs to destroy my aws infra.