Eleven hours. For eleven hours, the mob badgered Hillary, trying to wear her down, hoping she'd make some kind of mistake or lose her temper, so they could get a video bit to play for the elections. After those eleven hours, Hillary was still calm and smiling, looking like she could go another eleven hours. In contrast, a couple of the Republicans had gone into screaming meltdown mode, and they were all looking sweaty and flustered. That will make for some nice video bits for the Hillary campaign.
If nothing else, this ends any questions about whether Hillary's age is a factor. On her own, she easily outlasted the younger folk who were going after her in shifts, and she demonstrated the ability to stay calm and focused under duress. That's what people want in a president.
(Item of concern: Given what a stellar endorsement of Clinton this show trial was, will the Clinton campaign now have to count the $4.5 million as a campaign donation?)
And for a laugh, imagine the performance of any of the Republican candidates if they were getting grilled for eleven hours.