I would still stand by the 3 year deal, I think that it's just not necessary or wise to keep beans that long, whether you are a home or commercial roaster.
When I commented on the 6 month time frame I had just gone through a "learning experience" with one of my bean suppliers.
I cupped some beans, Guatemalans, which were terrific, I ordered 4 bags, current crop year and started to use them,
when I was about half way through the 280 kgs, a bit after 6 months, I noticed a definite change in the cupping of my roasts of these beans.
I took some down to the supplier, along with some other roasts and 'blind' cupped with them.
When these two particular beans were cupped the response was unanimous; 'old beans, pine wood, lacking freshness'.
When I then told them which beans they were .......... well, I won't go into that side of it here but needless to say the beans had to be thrown out.
The beans were packed in grain pro bags and I stored them in temperature and humidity controlled conditions.
Not all beans will deteriorate this quickly, in fact these are the quickest to go off that I have come across,
(the suppliers made all sorts of noise about it being common).
The only other beans that I have had, which have been stale, are 2 bags of Brazilians which appeared to be an older vintage, (same supplier)
repacked and relabelled with a more recent harvest date than what the stale hessian smell indicated. A second opinion confirmed this.
So I would certainly agree with you, for home use, purchase beans from a known crop year, store them correctly and use them within about 12 months, maybe a little longer even, for some. In my small time commercial environment 12 months, or crop to crop is my limit but I won't purchase 12 months worth all at once.
I think I made the point in the previous post that it's not safe to assume that all beans are going to 'go the distance', rather than make a
hard and fast rule re 6 months.
I know I was pretty cross at the time, so I'll see if I can find the old post to see whether or not my comments were too influenced by
my losses, which exceeded $3k.