Sounds to me like the information is getting a bit loose here. As I understand it, it is not the discharge that shortens the life span of the pack (provided it does not exceed the battery manufacturers specification), it is the top of the charge that shortens the battery life. This also seems to be expressed by the Cycle Satiator graphic from the Grin website.
If you are going to follow the path of charging for pack longevity, then do not charge your cells over 4.05 volts and do not discharge them past the manufactures limits. That means you have to know what cells are in your pack, and if you are running a bms then it must be able to balance at your (low) top end limit. Or, you only balance charge every once in a while....Like once a week or so. As stated above running to LVC can cause your pack to get out of balance more quickly. Especially as the pack gets older.
If you are going to work on a daily basis and know the route you are taking then after a few round trips you should know how much of a charge your pack needs. So topping off the charge just before you leave may not be necessary. What might get you is if you unexpectedly have to go farther then you had planned when you left to go to work. Having a charger with you, or an extra one stashed at work is a good idea in case you have to top off at work.
Favorite Quote: "This is L.A., sugar. There is no 'over the top." --- Chris Erskine
Current build: Liahona w/ cheap front suspension and suspension seat post. Yescomusa 36v 800w generic front hub motor. 15ah Headway triangle mounted pack. Tronsung 30 amp,
Previous Build:1992 Trek Antelope 800 - Bone Crusher (no suspension) - Yescomusa 800 watt 36 volt front wheel kit. Don't do it! Get suspension!!!