? Old fashion polygon box modeling works, and it can be really fast to work with. While I prefer to model everything in zbrush, from hardsurface to organic modeling, I wouldnt call it -between lines- an outdated workflow. Create a cube. extrude face, make a cut as you call it is a series of operations that can be automatized via a script or mel or through a Houdini asset, and you can model pretty much everything from cups to ships with it. Is not like it can be done. You can do anything from organic to hard surface and if we are comparing Sketchup quality -except a very few talented artists- is well behind anything any major DCC can do from what I can tell.
I just dont understand your way of thinking. Yes, some softwares has better tools… but remember, back in the day DCCs like Maya introduced several modeling options, because back in the day we had nurbs, subdivision and one other think I dont really remember the name, no one could foresee the future, so we had lots of options and eventually one workflow stuck as the best among the others -I still have friends that swear nurbs modeling is the best for everything- It takes time to see what works and what not, it takes practice and it takes study, and a major DCC app has to cater to a lot of needs, from sims, FX, animation, modeling, rendering, etc… sketchup is an specialized app… they have “only” one job, so is no surprise they excel at what they do.
Look again and all the beloved characters done with box modeling, did they really “damned everyone” ?
On the other hand… sketchup is free, so why not add it into the pipeline? I added zbrush to mine, and im a very happy animator.