Stacking can become an issue for individuals with longer draw lengths, 30+ inches, but the majority of trad shootersfall under 29" and it's typically not an issue.
My Bear Kodiak Mag stacks like a brick wall past 28".A lot does have to do with the length though.
Ever notice how Byron Ferguson says that even if you drawa 1/4" below the recommended draw length you will loose considerable performance from your bow. And if your past about an inch below the recommended legnth you should consider a custom bow. I've always wondered what that was all about. Yea, you might loose a little as determined by the draw force curve. But it sure isn't much on most bows anyway. Just wondering how much actual performance you'll loose shooting 1/2" under recommended draw length other then poundage. I think it's a little misleading especially to beginners.
I asked Craig from HH one time (mainly because of BF comments) what I'd loose other then poundage if I used a HH bow measured at 30" at 29". He said nothing.