Hi
Am I shooting with it or at it?
Stuff like springs will need changing every few thousand rounds to keep things running smoothly. The recoil spring it the that gets changed the most often, followed by the mainspring.
With jacketed bullets you probably will shoot out the barrel at 20,000 to 30,000 rounds. With lead bullets the barrel is good for > 100,000 rounds. There is some variation depending on how hot you load and exactly how accurate you expect the pistol to be.
The frame to slide fit will start to loosen up as soon as you begin shooting. With an alloy frame it will get objectionable at 10K to 30K rounds. There are a *lot* of different alloys out there. You can not re-tighten an alloy frame, so replacement the only option.
On a steel frame, you should go 20K to 30K rounds before things get loose. Most steel frames can be tightened up three to five times depending on who is doing the work.
Past that it's just small stuff. You aren't going to get 150K rounds out of your original sear or disconnector. I would expect at least one odd part to break every 20,000 rounds or so.
That's all in terms of wear out of the firearm.
In terms of operation, you should be able to run a thousand or more rounds through a properly lubricated weapon without a malfunction. Cleaning is optional on a 1911 through about 500 to 1,000 rounds.
Bob