I had that same Ethiopian as part of the subscription in September the greens had only just arrived at the roastery then. So I would guess the greens have been stored at Wendelboe for about 6 months, given that they have a very good setup for green storage I would hope that the greens wouldn’t have noticeably aged by then.
Obviously every green is different in regards to aging but greens can last for a long time if stored with good temperature and humidity control.
I would get in touch with wendelboe about the coffee if it doesn’t taste that great and see what they have to say. When I had the same coffee a few months ago it was very good, surprisingly funky and tropical for a wendelboe coffee.
Edit: I just checked our current green stocks and the natural Ethiopia that we have is from Q1 2023, so the same harvest period. The current harvest for Ethiopia has just about finished now but probably no one will have late 2023/2024 crop ethiopia yet. So any roaster that has Ethiopia for sale currently got it from 2022/early 2023.