My commute is zero. I travel for a living, and work from home in-between trips. I also have five other vehicles. Sometimes my BMW sits for weeks on end, especially in the summer when the convertibles come out to play. So I put it on the charger. My Alfa has one too. So far the others have not shown a need.
For that matter, the BMW seems quite happy to sit for weeks (occasionally I forget to plug it in) but given the cost of battery replacement it only makes sense to take the extra effort.
'11 328! Touring - Tasman on Chestnut, 6spd manual, factory upside-down "i" option