"Uncommitted" is at about 15% now vs 10.7% the last time someone (Obama) ran unopposed, but most votes haven't been counted yet. I would have waited until the counting is over before talking about major rebukes.
There would have been well over 10,000 even with no campaign at all.
We went back and looked at Michigan Secretary of State data to see how many uncommitted votes have been cast for each party in the past presidential primary elections.
Turnout is much, much higher than it was during Obama's uncontested run. It looks like it's going to be about 925,000 total Democratic voters, as opposed to about 195,000 in 2012. With that said, 50,000 is still about 13.5% of the votes counted so far, which does look unusually high to me, although I would need more context if it was my job to advise Biden.
Anyway, that's not really the point I was trying to make originally. (There's no point in partisan bickering about something that will be objective fact tomorrow.) I was just annoyed that the media was jumping the gun before the votes were actually counted.