ehh, what? i'm a bit confused.
maya can render non quad models just fine. Are you talking about CAD/Lidar data? this is often used in post production, it may just look like it was created from a bunch of booleans. Lidar scans will be lots of triangles.
Maya is customizable which is why companies want to use maya. The maya i'm using now is better than your maya because there is a dedicated team writing plugins for us. There is a thing called a pipeline that everyone has to work within. It is basically how a shot gets made, who does what and how it is passed around so everyone can do their job. I think you are too focused on the modeling aspect of the industry. modeling is the very first thing that is done. They are some of the first people to go home at the end of a day while others stay on to finish the shot.
https://www.cgsociety.org/index.php/C...ureSpecial/mpc

btw this thread is 4 years old.