We think that this kind of feature would hide issues from the developers.
Sometimes you can lose communication with clones and can't send any "Stop" request.
In this case, those clones stay in memory in a running state, and it is very hard to kill them. Stop or Kill launcher have no effect. The only way I have found is to close the project but it's not very usefull.
It will be good to have a watchdog mechanism to kill lonely clones
As discussed here JKI SMO and drjdpowell messenger library, have this kind of mechanism.