Simple PLM Technologies?

 I spent most of my long Thanksgiving weekend break out of PLM-ish world. Also it was Black-Friday, so world around me was overflowed with ads and sales promotion. Interesting observation- world is short and flat. List and link is most successful abstraction to present data around me. So, why we are trying to present complex structures and hierarchies of data to user? I think users will like data to be presented in simple lists with selection and links. BTW – first BOM was list of items (not tree).

 What is your opinion on this?