OO comments that can apply to lots of things really

The real advantage of 00 is when it is applied across multiple projects. Although identifying and objects across a single project is difficult, it surely cannot be an order of magnitude more difficult across multiple projects with multiple teams can it?

Yes it can!

As with most things, there is always more than one way of looking at problems. If the issue is maintenance, which I agree with, then consider this;

Cars become increasingly expensive to maintain as they become older. One option is not to use the car, a more realistic one being to replace it after a time. Of course you could buy an aluminium bodied, highly over engineered auto to last a long time but few people would consider this option. And if 00 leads to easier maintenance, as relational databases were going to, surely this means that we have accepted the fact that it is impossible to once and for all fully specify software before it is initially built. Quick, someone, better go warn the methodologists about this!