History.

One word: History.  Groth Vineyards & Winery made Napa Valley history when their 1985 Reserve Cabernet Sauvignon received the first 100 point score (for a domestic wine) from wine critic Robert Parker Jr.  There is only ever one first time for anything, just one.  The first perfect score is a great history to have and Groth owns it.  In reading histories of the Napa Valley, it bothers me when I read articles about some or other bog-standard Napa Valley winery and the way in which said winery has helped shape the valley that both locals and visitors see today.  Groth is never mentioned.  (In the same way it irks me when a German, Charles Krug, is credited with producing the first commercial wine in Napa, when historical documents quite clearly show it was an Englishman, John Patchett.)  I always believe credit should be given where it is due.
Groth also have a history of making varietal wines that taste like what the label purports to be in the bottle: 38 years of that particular accomplishment to be exact.  (One would think that was a simple ask, but not every Napa Valley winery can claim that feat.)  Personally, my favourite Groth wine will always be any vintage of their Oakville Estate Cabernet Sauvignon  The Oakville is my go-to cab when I want to drink something that truly tastes like a cab.
Groth most recently proved that they are not the new-kids-on-the-winemaking-block when it comes to producing wonderful Cabernet sauvignon.  Groth's 2016 Reserve Cabernet Sauvignon was named no. 4 in Wine Spectator's top 100 wines of 2019 (an international list).
So what's the wine like?  Gorgeous.  The nose, redolent with blackcurrant, black cherry, lavender and mint is everything one would want in an Oakville AVA Cabernet sauvignon.  The mouth has more black fruit, red current, raspberry, elegant tannin structure and perfect acid (that is on point, like the acid in cranberries).  Those peeps at Groth know a thing or two about making a winning red wine...again, and again, and again.
Groth is history.