This information is from NPR by Marisa Lagos:

“If we counted at the moment that the polls closed, we would disenfranchise people — simple as that,” said Kathleen Hale, director of the Institute for Election Administration Research and Practice at Auburn University. “And if we expect to have a count within four or five hours after the polls close, we need a much more sophisticated and, quite frankly, expensive infrastructure to make that even remotely possible.”

On Super Tuesday, 14 states including California, Colorado and Utah will all cast ballots. The western states increasingly rely on mail-in ballots that often take longer to count. More than 60% of California voters cast absentee ballots in 2018 and it took weeks to call some races in California and Arizona that year.

In multiple counties in another Super Tuesday state, Texas, voters will be casting ballots on brand-new equipment for the first time, which could also lead to slow results and late-night snafus.

Read the full article here.