if you had some of the problems are render team has had there are days you would like to level autodesk HQ tankfully there next release usually fixes it but heres some examples
saving as an ascii file you can edit it to use older maya versions binary you cannout
in maya 8 there was a rendering error when rendering an animated scene so imagine having 6 rigs running for 15 hrs only to realize that your characters arm isnt there because of the rendering bug so you have to start all over from scratch after renaming multiple scene files in ascii format so they ran on maya 7
if you save in binary first you CANNOT save as ascii that is fact its a pain in the ass
theres a multitude of other issues but those are the core problems ive encountered
but for that rendering issue imagine the Jurasic park film it too a god damn super computer it took 2-4hrs and upwards of 6 hrs per frame now imagine 24 frames = 1 second 1 second = 144hrs spent rendering granted they have render farms but you really got to look at it if Industrial lights and magic didnt have the financial backing they did it wouldnt have ever finished almost every scene with a dinosaur is touched with 3d so if just 1 second is 144hrs spent add that up over the course of the entire movie now imagine if the render farm was set to render and do its job only for the render engine to malfunction halfway through the process. Thats why i hate SOME aspects of autodesk because they didnt really innovate Autodesk is to 3d what EA is to game devs
Autodesk just bought everyone out and called it a day