We are all creatures of habit, and occasionally we’re controlled by prejudices that may be unwarranted by recent developments that aren’t thoroughly explained.

For example, many older wineries that are in business for eras make substantial upgrades in their wines and get little credit. The public often doesn’t understand the improvements.

Dan Berger lives in Sonoma County, where he publishes “Vintage Experiences,” a subscription-only wine newsletter. Write to him at winenut@gmail.com. He is also co-host of California Wine Country with Steve Jaxon on KSRO Radio, 1350 AM.