Its dangerous to say a place the size of Memphis has no nice areas. We aren't comparing "nice" to the standards of other cities, what sense would that make? "Nice" in DC is different from "nice" in Memphis, so I'm speaking relative to Memphis...
Cooper-Young and most of Midtown is nice, and safe, and walkable. Its nice areas over in East Memphis around UM and the botanical gardens...
Black people who own their homes and make good money live in various areas in North and South Memphis like over here in Westwood:
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If you trying yo compare it to nice areas in Atlanta you tripping. Atlanta is way bigger with a far larger corporate base, that has been injecting more money into Atlanta for a long ass time. Salaries are higher in Atlanta, poverty is less, you combine all these factors, of course nicer areas in Atlanta are nicer than the nice areas in Memphis....
It's a majority black city, saying there ain't no nice areas there, whether you're being intentional or not, is an indictment of black people and how nice we upkeep, how nice we are, etc...
They are all comparable to Memphis in metro size...
Hartford isn't really a suburb either, its historically got the cache in Connecticut, that Memphis had in Tennessee, and has been afflicted with much of the same social ills as Memphis, namely white flight and disinvestment. Its an important city in its state and walking around both cities, its not really smaller than Memphis...
You could use your "Hartford is a suburb" example in reverse against Memphis, which is over 300 mi² of land in the "city" of Memphis; Memphis covers the same amount of land as New York City with 14x fewer the population because there are large chunks of Memphis that look like this:
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That's "city living"

this is in the "city" of Memphis. All the areas like this in Connecticut, are not in Hartford, so if you cut all the fat and empty land and area in Memphis, it essentially is Hartford's size. Somewhere like Capleville is so far out from the center of the city in Memphis, it would be a suburb in Hartford:
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Memphis has hella areas that are effectively suburbs, that are in the city limits, because of how large the city borders are...
If you took Hartford and its surrounding suburbs together you'd get to Memphis' ~611,000 people, much quicker than you'd get to its 300 square miles...