Well, I had to open a new bag of coffee yesterday. Sadly I REALLY wanted to try the Kirkland House Blend in the white with greenish lettering bag (med/dark roast). But, on a trip to my basement cupboard I found a bag of SF Bay FR. I guess I'd bought it when I was squirrelling away (hoarding) coffee due to all the (false) scare news about severe shortages, price spikes to $20 lb and so on.
IDK how long that bag was down there, unnoticed until I went to look for some pasta. I'd stashed it where I normally stashed dried pasta. So, IDK how old it is other than the expiration date was last month
It's not terrible tasting but it's certainly not all that good.
One thing I have noticed about coffee that is not good to begin with or has gone south due to age, is the deficiencies really come out when used in a drip machine, and tend to not be so bad when used for espresso. Because yesterday I pulled a shot with it and it was not bad so I thought I "dodged a bullet".
Guess I will have to experiment with the Breville and see if I can get rid of a little of that "sourness" I seem to be noticing. I hope I can as I have a looong way to go for it to be used up.