I guess I’m with Bogle. The US is the most solid country in the world and US firms are so tied to the global economy that you get international exposure as a result. My investment in ^AAPL has been creamed over the last few months due to conditions in China (although, fair enough, the cause is really the dotard in DC, so it’s complicated).
As for the 2045 fund vs VTSAX… Funds that are geared toward retirement dates are also based on past performances and, while VTSAX could see negative growth for a decade, sure, bonds are in a weird new space. Take a look at any chart of historic bond returns… are we due for a reversion to the mean? Or are bonds going to stay low for the foreseeable future? Heck, think about the conniption that the Commander in Chief had when the Fed wanted to raise rates. Sure as heck those rates aren’t going up any time soon. And that’s on Fed Rates. As far as Treasuries, my bet is that they are going to stay low for a looong time so as to reduce the amount the US has to spend on debt servicing. And then one day, out of the blue, when the national debt has surpassed some magic number, they will shoot way way up and not come down. But what is that magic number? And when? Ah, therein lie fortunes to be made.