Battery life deteriorating is only a pain point because they make it so users can't trivially service the battery themselves. It is amazing seeing the walk back over the years from sensible affordances to the consumer to binning those features behind expensive repairs. I still remember my ibook where you could pop out the keyboard with your fingers and pop out the battery with a dime. I remember when they released the unibody macbook and they gave you a simple clasp to access both the battery and the hard drive as they were anticipating consumers shifting to SSDs in the near future in 2010 and wanted to offer an affordance. Slowly that went away. The latch went away for a dozen small screws that are easy to strip and lose. Eventually the ability to change out the drive or the battery yourself went away too. Slippery slope of setting up user expectations for a worse version of the product in a few generations from certain standpoints. Sure it is faster but imagine if it was faster and also as serviceable as devices used to be. There isn't good reason for it other than to gouge you when you spec out your macbook at rates that are always at a convenient premium over today's prices for these hardware.