Disadvantages of running software through compat5x?

[Ashley Moran]

I have only one machine left running 5.4, but unfortunately it's a live web 
and database server (tight budget!) so I don't like tinkering with it too 
much.

I was going to reinstall it with 6.0 and I just wondered if there was any 
reason why you shouldn't run a production server on the compat5x port for any 
length of time.  I can't afford the downtime to remove all the ports and 
re-install them.

Ashley