Good read!

Recovery is simple - like you state: sleep, food, hydratation and time.

What you can add to improve is anything that slighly increases blood circulation while not adding any trainingsload - this will help speed up recovery but that doesn’t need to be a product, for me as a frequent marathon runner that just means low heartbeat recovery jogs (or even just walking). All these fancy products/ hypes do (at best) is just that increase blood circulation a tiny bit, which you can all do for free (and better) by just old fashioned walking / cycling or stretching.