Of the TV soaps I only watch Neighbours, but that has a few of the silly soap formulae, e.g. people move in & out of houses & flats, change jobs, arrive & depart from other parts of the country or even the world, in a matter of minutes. Entire life-changing situations just happen with no apparent administration or anything. If a journalist wants to become a nurse - bang! It happens. It doesn't especially bother me, in fact it makes me chuckle and it is a very soapy thing.
I long since stopped watching Eastenders for some of the reasons already given but it did used to make me laugh when YET ANOTHER long-lost relative, some previously unheard-of Mitchell or whatever, rolled up in a taxi, got out and looked around at the Square. Thye'd never once been mentioned - yet everyone knew who they were as soon as they saw them.
I also used to love the "morning establishing shots" - postman walks past, person in nightgown opens front door, yawns and picks up milk bottle.