It's not that interesting - it's just that there is a much larger number of parties who have to be in agreement about the sale, and the sale price, than is typical - you end up with probate court judges, lien holders, the executor, the estate's attorney as well as possibly a second real estate attorney for the estate and absolutely all of them (and their staff) can be sick / on vacation / golfing which wreaks havoc on the closing timeline.

Plus if there is any FUBAR paperwork it is much more difficult to fix if it means going back to probate court to (for example) add a spouse who was wrongly omitted from the approval to sell ... in this case, I ended up getting the mortgage and deed by myself and then quitclaiming the property to the two of us because that was less hassle.

Oh, and short sales in probate are basically always as-is because the estate has no money to make good any repairs to the property.