How do non-BA stouts hold up over time?

I had a 2014 Huna at Huna Day this year and it was amazing. Seems like it held up pretty well with aging.

 

All of those you named should be fine with 6 months to a year on them. They're all big guns in the 10%+ category which typically age pretty well. You may find that some of the additives become more muted over time, like the maple syrup and coffee.

That said, I've been surprised by how well the flavors hold up on some of those; I had a bottle of Last Snow's first batch that was a year old, and it was still bursting with coconut.

 

We had a bottle share a couple weeks back and friends brought a 2007 Old Guardian and that was pretty darn good! I just wish I had a decent cellar space. No basement, just a tiny crawl space that I don't trust leaving things in.

 

according to @PDawson in his book Vintage Beers crawl space is a perfect place to age beer
Cheers!

 

Hunahpu holds up very well. Even the 2012 is still drinking great, the 2013 isn't but I didn't think that was a good year to begin with. With Hunahpu, you lose the pepper flavors but the chocolate and cinnamon notes are still there.

I've had mixed experiences w/ aging stouts. Higher ABV stouts definitely hold up better. I've found certain flavors fall off more quickly than others. Any sort of fruit will be gone in ~6 months usually. Coffee will typically be gone after 1-2 years (Bourbon County coffee and BA Abraxas are exceptions).

 

I've had Expedition in most every vintage up to 5 years and while it really hits the "sweet spot" (IMO) at 4 years, every year was still very good.

Peche Mortel I've had up to 4 years and it is simply unreal at every year.