For me battery only needs to be about 2-3 hours. Otherwise I am moving from plug in to plug in (I leave chargers in many places like work, office, living room). Long enough to take a short flight without plugins.
I suspect that as more and more workplaces move to open-layout plans and have an increasingly mobile workforce, max unplugged work time is becoming more and more valuable as a feature.
At previous jobs we were just very generous with the chargers. Everyone having a single charger connector (MBP) is super valuable . This is good because then you dont bring a charger with you, because you know each meeting room has one or more chargers. Each seat in the office has a charger etc.
Companies sometimes say "Yeah but $90* X is too much" ... But it costs a lot to have people wiring/unwiring chargers all the time. 3 minutes at $1 a minute adds up to $90 really fast.
We do that at work. Things get complicated with the latest-generation MBP of course - now we have the old MagSafe charger, ThinkPad chargers, USB C chargers, as well as HDMI, DP, and USB-C Thunderbolt video connectors.
Our first few USBC MBP users in our office are having a ton of "fun" with that. Also the "which monitors do and don't work with this thing? Which adapter(s) do I need for this one again? Damnit that didn't work, lemme try this other one..." game. TONS of fun.
