There are too many variables on how long one can last. Bear in mind that usually when one lose their job, their expenditures will be greatly reduced as compared to when they are working (provided that person is a non gambler).
When you calculated can last 8 mths, in actual fact usually can last to a year ..But with so many foreign influx, the probability of landing a decent job is greatly reduced. So in order to last longer, we should try to do some part time jobs, e.g. packing, delivery etc at least can earn some money for makan and bills.
I quit my jobs many times without finding another, usually I will do some part time jobs and slowly find a decent one.