Apple sent out invites yesterday for a pre-Halloween Mac announcement. The MacBook Pro is believed most likely to get updated at the event, but honestly iMac is likely not out of the question or maybe even MacBook Air. So to avoid buyer’s remorse, maybe wait until after October 30th to buy a new machine.
They can, although you’ll hear plenty of stories about them failing, or people spilling coffee or something on them so they don’t. But a lot of buyers baby their machines, so it’s absolutely possible. Not sure how fast they would be at this point, probably more suited to casual web browsing or streaming services, but they can last awhile.
My mother didn’t really pay a lot of attention to her macbook and it stills works after 9 years (i think).