I'll flesh my personal bias at the outset - being a heavy diesel mechanic for a time, and mechanically inclined my entire life, I use Anti-Seize wherever I can. If it has threads and it's not part of a rotational mass like a driveshaft, clutch, or hub, I use it. It's served me very well over the years. Specifically, I usually skip the copper and use the slightly more expensive nickel anti-seize to avoid reactions with certain metals and increased temperature limits.
Recently, I've heard an (as of yet unsubstantiated) claim that Anti-Seize is an abrasive because of the metal content on this bicycles.SE question and then after searching here. If this has any merit, it changes my understanding of the substance in a fundamental way.
Now there IS good reason to think of it as a lubricant, starting with the title, 'Anti Seize Lubricant', one of the primary ingredients being grease and graphite (graphite being a solid lubricant that shears easily), the datasheet, which describes it as such. It does warn:
CAUTION: LOCTITE Nickel Anti-Seize Lubricant is not a high-speed load carrying lubricant and should not be used on ball or roller bearings, or on parts where lubrication is critical.
This tells me yes, it's a lubricant, but not for specific lubrication issues. The only thing I can find to substantiate the abrasive claim is this datasheet under the Moly Plate section, where is states this:
Does not form a carbon abrasive after high-temp exposure
Could it be the case that the people who mention the abrasive qualities are those who have passed the heat rating of their anti-seize? This is a possiblity, since most people use the copper type which is only rated for 550°F, where I consistently use the nickel type rated for 2,400°F.