One of the most common types of voter fraud is ballot harvesting. Elections that rely on large numbers of mail in ballots are particularly vulnerable to this. The person committing the fraud will gather ballots from nursing homes, etc., fill them in, and then submit them by mail, or drop them off at a polling station.
It is very difficult to obtain evidence of the fraud, because the person who was the victim (the person whose ballot was stolen) is unlikely to vote. Hence, the fact that someone else cast their ballot doesn't come to light unless there is some other impropriety that draws attention to the situation.
In Nevada the Department of Elections has received signed affidavits from poll workers (not poll watchers) who saw evidence of ballot harvesting in the form of people dropping off multiple ballots, or in one case, people filling out stacks of ballots in the parking lot of the polling station.
This is persuasive evidence, and it is precisely the type of evidence one would expect to see in a ballot harvesting case.
So yes, there is evidence of fraud and impropriety. And nobody knows how widespread it is, because the way this election was conducted was so exceptional (in Nevada unsolicited mail in ballots were sent to every registered voter; meaning that there were tens of thousands of unsecured ballots floating around the state that could potentially be harvested).
However, as has been noted in this thread, to pursue a court case for election fraud, one must show not only that fraud occurred, but also that the amount of fraud is enough to alter the results of the race. So the fact that cases are being tossed out is not indicative that there was no fraud or impropriety in the election; just that there was not enough to make a difference.
I will concede to anyone that the amount of fraud is nowhere near the level that has been alleged by the Trump campaign. I applaud the decision to fire Sidney Powell. Rudy G. should also be shown the door. Their public rhetoric is all bluster, and needlessly undermines public confidence.
That's different from what is happening in court. It is common for lawsuits (even meritorious lawsuits) to be filed based on unproven allegations. You can't file a lawsuit that says "maybe" something happened. You have to allege every cause of action that you believe you might be able to prove after discovery has occurred.
In many cases, a plaintiff must file the suit in order to get access to the evidence they need, because you can't issue subpoenas, conduct depositions, etc., until after there is a lawsuit. In an election fraud case, you'd have to file right away, in order to have a claim heard before the election is certified, before evidence is disposed of, etc.
Responsible attorneys will amend or withdraw claims that can't be proven once the evidence has been gathered if it is clear they do not have a case. That is exactly what we are seeing, as many of the Trump lawsuits have been voluntarily withdrawn, or replaced by other claims that the lawyers apparently believe are stronger.
The fact that the cases are being dismissed is good news. It is evidence that fraud was not widespread enough to impact the election. It is NOT evidence that claims were baseless or that they were filed in bad faith.
The allegations about the Dominion software are the last hurrah for Trump.
There is certainly enough reason for them to want to look into this, considering the history of Dominion, including prominent Democrats advocating against the use of the machines (because they were not secure and were vulnerable to hacking), the state of TX refusing to certify the machines for use in that state, and the fact that there was a "glitch" this year in Wisconsin that switched Trump votes to Biden (local officials caught it and fixed it).
It appears the states will be able to refute any claims based on corruption of the Dominion machines. Once this occurs, there will be nothing left for Trump to challenge.
Previously, I predicted Trump would concede by Dec 1. I stand by that. However, I forgot about the Thanksgiving Holiday impacting court schedules, so it might be the 3rd or 4th. We'll see.