I think the online numbers may be significant. The old white people demo is probably non virtual.Doubtful. Most likely that more people watched online in 2016 which would make these comparisons even worse.
But...as I stated way back...the format is really not the fault of the DNC (but their candidate is)....
The RNC will face the same problem with the format this year.
it will be interesting how the cable news channel viewership changes. I watched Fox and msnbc. I liked the approach of using commentary that Fox did.
And I think Fox did it to limit the number of quacks they would have to show talking at the RNC and defend it by saying they used the same approach for both parties.