Point of fact more so than dispute: Mayron's did indeed follow the 1960s Jewish diaspora from Hartford's North End further west on Albany Avenue to Bishop's Corner in West Hartford, where it was in the shopping plaza occupied variously by Popular Market, Saxony Deli, Kay's Fish Market, and now long-anchored by Crown Market, a kosher establishment that includes a bakery, deli, and full supermarket. Otherwise, you are correct that it was justly lauded in its existence and has not survived to the present.
My various Likes within this thread might mean, "Oh yes, definitely," or, "Thanks for the heads up." That's good indicator of a solid food thread. Thanks for kicking it off with you first post, and welcome to The Boneyard.