As so many people have been talking about this Matt Page, I watched the video too.
Support makes a difference. If I had support it would make a huge difference - probably the difference between coming in at 90hrs or say 89hrs 
I wouldn’t under estimate how much difference support could make to your times.
No queuing at PBP controls for food, then joining another queue to pay for it. No searching and possibly queueing for where to refill your water bottles. No long walks between facilities. No real bulge to contend with.
Some control over the food you get at each control, and hot food as well if support have cooking facilities with them. Instant swap over of water bottles with an alternate set already filled with your choice of hydration salts and / or energy powder for liquid calories. Quick resupply of solid food items to eat on the bike from a range you actually like. A place to get some shut eye without delay if necessary.
With support you can keep your stops as short as necessary and even bounce and be resupplied without queuing.
Because you’re getting the food and drinks you need without delay, you will be able to get more rest when you need it, rather than standing in queues, and getting stuff you can digest. You’ll ride faster as result with much reduced stop times.
Ability to dump spare clothes and kit for a hilly section in day time heat, or pick up a super light layers with uv protection for the heat . Then pick up night layers again and drop super light layers before a night section.
I can easily see it knocking quite a few hours off your elapsed, turning a full value rider into a comfortable sub 80 hour rider on PBP.
