That wasn't always the case. I have a 2010 era Mini and its a bear to dissemble. I need a putty knife, being extremely careful not to snap some of the plastic clips. Taking the chassis out and basically taking the entire thing down the the screws just to upgrade the ram and storage.
I JUST did this to the in-laws 2007 C2D to put in 4 Gigs of RAM. What a pain in the %@&*$!!! You swear you are going to break the thing in half when popping off the shell.