There is for and against MLCers continuing to live at home. They are called 'drop ins' by some, as opposed to 'Drop Outs' who can't get away fast enough, and treat us as if we had the plague, and 'droplets' but move out but stay in touch.
So little is really known about MLC - apart from having the almost universal denominator of a seriously strange upbringing together with a personality that does not cope well with failure or change (probably because their upbringing didn't give them coping skills.
Some MLCers stay for a while and then leave; others finally get kicked out by their long suffering wives, and some reconcile without their ever leaving.
MLC follows a script, but with variations. It is hard having them home in crisis, but it is also hard having them leave, especially if they set up with an OP.