I’m surprised the iPhone X battery was included in the $29 offer. I took advantage and replaced the battery in my day 1 X on 12/31. Was at 88% health, now obviously like new again, and I might just keep it another year because of it. Wouldn’t have done it at the old $80 price. Odd decision.
So you're saying that had you not replaced the battery under the program, that you'd have chosen to spend >$1000 on a new phone this year instead of opting to just spend $79 (or whatever full price is on a X battery) to replace your degrading battery and make your VERY POWERFUL, VERY MODERN iPhone X "new again"?
I think we've reached a point where it makes sense to just replace the battery after a year or two (or three or four, depending on your needs) as phones now have more performance than we need and still perform well for many years.