Whoa - the CoP discussion moves in The Tinfoil Hat Zone!
First, like any old mechanical device, it was easier to get replacement parts for the CoP when it was new than it is now. (Seen a tube tester at your drugstore lately? A head gasket for your Stanley Steamer at Pep Boys?)
Second, as Bicker correctly pointed out, Disney only thinks bottom line, and they have no need to come up with artificial reasons to do something - like get rid of a ride - if there's a (in their minds) sound business reason to do it (where are you, Mr. Toad ::sob:: ). Right now, (Dr)Tomorrowland kind of sucks - it certainly isn't working out the way they'd hoped. SpM and Buzz bring in the folks, and AstroOrbiter has such a low capacity that there's always a line, but look at the rest: Stitch (a poor revamp of a failed Alien), TTA (a fave of mine, but no draw), CoP, Timekeeper - snore city! They have to keep these things running, just to give people something (anything) to do.
Don't get me wrong - I LOVE CoP!!! DW and I see it every trip - as long as it is open - and usually more than once. One of the songs I whistle is GBBT, and I often wish for the narrator to say "triple dog dare" or "you'll poke your eye out". But c'mon, this is a ride designed to appeal to an audience of a different era - just like Tiki Birds, just like Tom Sawyer Island. And even if they recarpet, redo the seats and come up with 4 or 5 state-of-the-art scenes (narrated by Steve Martin!), the CoP, with it's mild humor and gently moving seats, will still play to empty rooms.
Be well.