I wonder what if we decide that 'fate sharing' is OK, i.e the client request flow (not the entire process) fails when a network step fails. How long can a syste

I wonder what if we decide that 'fate sharing' is OK, i.e the client request flow (not the entire process) fails when a network step fails. How long can a system stay operational after it started before the whole thing grinds to a halt? Seconds? Hours? Days? Would there be a huge ding or small ding on the SLIs?