Trader Joe's got bought out years ago. They're now owned by the same family that controls Aldi in Germany.
Kind of old news. Ancient, really. Per Wikipedia (emphasis added):
The first store branded as "Trader Joe's" opened in 1967. This store, on Arroyo Parkway in Pasadena, California, remains in operation....
Germany's Theo Albrecht of Aldi Nord bought the company in 1979 as a personal investment for his family.
Trader Joe's was still a small, local chain when Albrecht bought it.
Anyone who thinks an Amazon-owned Whole Foods would go on more or less as it is today, lacks imagination. The possibilities are endless, more than my feeble mind can spin on its own.