Don't go around feeling unappreciated. Not yet, anyway. Went on a call ten years ago, tub drain was clogged up to beat the band. I went in and worked on it for a while to no avail. Went down to the unfinished basement to explore the possibility of breaking into the waste line and maybe attacking the clog from that angle. It was a small bathroom done in cast iron with leaded joints, late fifties or early sixties. I was thinking on the way down the steps that, worst case, I could cut out the trap and go back in with plastic with a no-hub or fernco. Find or remove the clog right there and keep on truckin.
Well, what I ran into was a virtuoso performance by some plumber at the top of his game. I couldn't break into the system without taking in all down. There was no pipe there, just fitting to fitting. The iron trap with the brass c/o in the side went right into a wye to catch the lavatory, which went into a long sweep in 2" to the right which went into a 3" wye to catch the toilet, then another long sweep around heading toward the pipe going out.
The plumber brought the bathroom group together in cast iron, leaded joints, without cutting any pipe at all. He put all this together in his brain, then made it work.
Just got to admire that kind of skill.