I’ve stayed away from this thread for years, but now will put in my observation.
From the Yekke side of my family….
Heimish is ‘real’ unpolished, not putting in airs or false sophistication. A taste of ‘real’ life where a momma raising multiple children without servants doesn’t worry if the kugel has a few well done crusty edges and doesn’t look like a picture in Gourmet magazine.
The Heimish bakery has things that taste good, not look good without taam.
Heimish people do and make, not have their servants do it for them and let dinner guests rave about the the hostess’ cooking.