> refactor `main_implemntation()` cleanup to run once on `launcher::shutdown()`, not sure why it was defined like that (unreachable code, at least for iidx)
> not thread safe, but probably not needed (no obvious failures as well)
> related to #1
> separated commit in case this functionality is already provided through other means and needs to be reverted
> probably target for rehaul in the future for better/less invasive approach
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smpn2