I'm only posting to let you know there are still people who use Secondaries regularly. I leave my beers in Primary for at least 2 weeks, and I secondary about 95% of my beers, Main reasons:
- I harvest yeast from most batches, and believe it is healthier if I don't leave it under pressure for too long.
- I dry hop about half my beers, and don't want to have hops in the yeast I am harvesting.
- Yeast does become canibalistic, and autolysis is real. Many of my beers are a couple of months in fermenters, and I would prefer not to have them on a lot of decaying yeast during that time. I will agree that most of the time you can't notice it, but it is going on, and I don't want my beer on it.
- About 25% of my beers are Belgians that I ferment hot. Heat accelerates the decay of the yeast; again I don't want my beer on decaying yeast.
- I use enclosed fermenters (no lid, just a 2" hole in the top), and they are a ***** to clean if you leave all that kraeusen debris at the top to dry out too long.
- Habit.
I've done a couple of quick beers (4 weeks) and left them on Primary the whole time and they have been fine, but I guess it is part of my routine that every beer gets moved after about 2 weeks (fermentation finished + extra time for diecetyl rest), some take longer than 2 weeks.