QUOTE(patryn33 @ Jan 21 2016, 02:54 AM)
coffee needs to degas for few days to achieve its peak after roasting.
store bought roasted on 21st Jan 2016 and home roasted on same day not going to make yours any fresher. Home roasting you can nail down the time its roasted but I yet to come across studies that 1hr diff makes great diff.
home roasting makes sense if one cannot get access to "fresh" beans by that I mean beans that have degassed for over few days. many tried to consume their beans with 14-15 days after their roast date.
many times home roasters is doing it out of passion more so than freshness of beans.
You forget two other factors.... control & cost.
If you control the roast, you can try out different roast profiles using the same beans. It would be nice/interesting to try out different profiles to see what suits your personal preference instead of the roasters. The other thing you can control is the blend since most green beans are effectively single origin when purchased.
The other factor is the cost. Getting consistently freshly roasted beans in turn mean two things: premium services and small quantities. Premium services because not all coffee beans sources cater for aficionados ; eg all regular store-bought beans from supermarkets don't have roasted - on dates. Small quantities because unless you are a heavy consistent coffee drinker (or pull shots for more than one person like I do) it is difficult to finish a large bag before the tail end gets stale. Therefore, small bags. Small, frequent and fast supply means high transport costs.
Both these factors mean substantially higher prices. Roasting at home means you can guarantee freshness by roasting exactly what you consume, exactly when you want/need it, exactly how you like it. You buy green beans in bulk (by the kilo) as they can keep easily for 6 months to a year without significant degradation. You aren't paying some courier company RM 6 every 2 weeks to move a paltry 125gm or 250gm bag a few km, or the parking fees/petrol/car maintenance costs incurred when you drive to the few stores that stock beans with Roast by dates.
Thus ends my geek rant....