I have to say that on a scale of 1 to 10 recording "jobs well done", my efforts at clearing blocked drains have to score pretty highly.
We have two sides to the house, from a drainage point of view. The Old side drains the kitchen, plumbed-in dishwasher, the upstairs bog & bathroom. The New side, which has been in situ for about 8 years, has a shower room, two bogs and a utility room with sink and washing machine. Before the extension was built, all showering went on upstairs and the washing machine was where the dishwasher now is.
A couple of times I have had to rod the Old side, where lavatory debris has built up and blocked the entire drain down to the point where the New side meets. Fortunately, the New side has always remained clear and at the T junction where the two soil pipes meet, it is the New side that goes straight on.
Once I get the rods working, when a big dollop of debris falls into the path of water coming from the New side, all we have to do is ensure that one or other of the new sides' lavatories is flushed and the debris is washed away.
I suspect that our problem was caused when we had the new shower installed. We stopped using the old, furred-up upstairs system as well as moving the washing machine and there was a big drop in the liquid:solid ratio on that side of the house. Since we had the solar panel, a new hot water tank and a water softener installed three years ago, we started using the upstairs shower again and the liquid side to that ratio has improved dramatically and we have had no further problem.