Yes, once again, the beast showed up, the Monday before Christmas. The first time was during the porch rebuild in 2015: I was so nervous I forgot to take pictures. This time it was to unclog the sewer. It took two days, in the bitter cold.
I had been stressing because the guy who came out initially told me several bushes would have to be moved. I didn't know how they would survive the winter, plus I had just transplanted the dwarf blue spruce this fall and it didn't look so hot. But fortunately only one small rosebush was in the way, and it's never been that great a performer anyway.
So now I can do my laundry with no fear of sewage backing up into the laundry sink, which really was quite disgusting. I had put it off as long as I could. It's no fun spending money on stuff you can't see, but peace of mind is a good thing.