No indications Moses is retiring. Could his level of play fall off a cliff to where he needs to be replaced? Sure, that's always a real threat with someone that age. It's why many have advocated for a competent swing tackle or investing a high pick in an OT even if there isn't an immediate path to starting. I think it's pretty universally agreed that there's a good chance Moses is gone next year as a cap casualty and him playing well for a full season this year is a roll of the dice like it always is at that age.