The nearest Aldi's to me is in Fresno, about 3 hrs south of me. I looked at their website, and if they ever move into NorCal, I'd check them out.
I shop at Winco, which is an employee owned, West US, bag your own grocery chain. Great meat and decent prices. On my 6 mile drive to get there, depending on route taken, I pass the following grocery stores: Raley's (locally owned, too pricy), Raley's One (non-union, but still too pricy), two Safeways (quality and pricing varies widely), two Nuggets (great everything, premium pricing though), Food-4-Less (low quality), Sam's Club (dirty), Target and Walmart (both have poorly stocked shelves requiring a trip to another grocery store).
Costco, Whole Foods, Sprouts, Grocery Outlet, and Trader Joe's are just a little farther than Winco.
Amazon Food was supposed to move near Costco, but that project has stalled (built, but not moving forward).
No wonder Aldi's isn't in my area. Too many shopping options.