> it can’t prevent deaths from accidents or foul play

Cory Doctorow's wonderful sci-fi book "Down and Out in the Magic Kingdom" explored exactly this in interesting ways. In the book people in the future can live essentially forever by transferring their consciousness into new bodies. They can also back up the contents of their consciousness, something most people do nightly but certainly before doing some dangerous extreme sport. Doing dangerous things without backing yourself up is considered tantamount to suicide since you lose all the memories and personal growth, essentially the person you became since your last backup.

People do get bored and will sometimes choose to "deadhead" for hundreds of years at a time, which is putting yourself into stasis and skipping those centuries. The book is full of provocative ideas about how practical immortality might actually work on a personal and societal level.