Technically Atlas is not a stretched out Golf - the MQB "platform" is not a platform per say but more of an engineering consolidation relating to major systems.
Here is a good wiki article (see 2nd paragraph) - and yes it has working citations.
VW MQB
My 7th generation Golf is incredibly built to say the least, tight as a drum with 53k miles on the clock. Only thing on carfax from first owner was a key fob battery x 2 (yes they went to dealer to replace key fob battery). Only sporadic issue that would be hard to duplicate for dealer is the backup camera doesn't work maybe 1 out of 20 times backing up, camera pops out but doesn't display on the infotainment.
The 5th gen Jetta Sportwagen is a post dieselgate special so it sat idle for ~1 year somewhere in the Southeast. Carfax had only routine maintenance from prior owner before VW bought it back with ~42k miles on it. Only issue we have had (covered under CPO) was a leaky panoramic sunroof which is a very common issue with any VWAG pano roof which probably was not helped by car sitting idle for ~1 year. Other than that over 2 years it has been flawless and now has about 60k.
1 year/10k services are ultra easy to remember and plan around. Oil change, inspection, tire rotation and car wash run ~$79-$129 depending on dealer and engine. My dealer runs $79 synthetic oil change specials for gas models, TDI doesn't get any discounts unfortunately and depending on coupon we typically pay $100-$110.
These are my 6th (TDI) and 7th (E-Golf) Volkswagens and very happy with them. My first 4th gen Golf TDI had its issues, my 5th gen Jetta 2.5 had its issues - VW had made great strides in quality since 1999. I continued on with VW despite some issues over the years because they overall just provide a better driving experience vs your typical Honyota.