Savin Hill is a part of the ashmont grill, urban pioneer, phenomenon. Much of the Melville/Wellesley Park area has also been bought up by the same type of people. That said, Melville and Wellesley Park are a relative island in the midst of decay. Lower Mills, Adams Square and Ashmont have been stable and did not succumb to the same downward spiral of decay as so much of Dorchester.
This is the same holier than thou crap that gets posted on this site. Ashmont has been Ashmont since the 1880's. Wellesley Park has been Wellesley Park since the 1880's. Savin Hill has always been a great area, especially over the bridge. They are neighborhoods or streets that have better designed housing stock with better land use controls than the surrounding areas, thus a more upwardly mobile people have always been attracted to these streets.
There were still Fitzgeralds living on Rundel Park when I was a kid. The Howard's (Better off real estate developers from the 1920's to the 1950's) still lived at the top of Ashmont Street when I was a kid. Melville Ave. has been a very desirable place to live for generations. There are no "urban pioneers", just the same type of people replacing the people 30-35 years ago who came from outside, bought up big victorian houses and then gloated "Isn't It Great. I get the same house that I would get in Avon Hill or Newton Center at half the cost". Yes the Ashmont Grill was rebuilt, yes dbar took the place of an Irish bar but the fact remains that the type of people buying these houses are the same, if maybe
not as wealthy as the people they are replacing.
Dorchester was built up for the most part over a 40 year time frame after annexation with victorian developments such as Ashmont, Jones Hill, Wellesley Park, and Paisley Park being built up with the intent of making Dorchester akin to Wellesley. (Don't laugh - The Hunnewells of Needham married into the Welles family of Dorchester and then broke off the northern part of Needham as a real estate development, i.e Wellesley after subdividing what is now Welles Avenue and the westerly side of Dorchester Avenue around Ashmont).
What happened was an almost insatiable demand for suburban housing that took place before the Panic of 1893. Lots that were to have grand victorian style houses became more vaulable as 4,000 to 5,000 square foot lots for three deckers. Excellent transportation links sealed the deal. Inexpensive yet sturdy housing got built alongside pockets of more "genteel" housing. Working class and middle class Jews came from the North End to the Blue Hill Avenue corridor, Irish came from the South End and South Boston to the areas east of Washington Street. The Jews left in the 1940's to the 1970's. (Read Death of An American Jewish Community). The Irish for the most part slowly bled out but many neighborhoods such as Neponset, Savin Hill, Adams Corner, Cedar Grove, and Lower Mills are still attracting Irish and other immigrants and many people I grew up with still live there or have come back from the suburbs.
I have seen this "isn't great I'm living in Dorchester and it is so much better than where I lived before" stuff in the late 1970's and early 1980's. Let see how it goes as the Vietnamese population gets wealthier and their kids move on leaving more three deckers to be snapped up by investors. Will Dorchester go the way of JP or will it go the way of Roxbury? Let's see if the so called urban pioneers make it through the next demographic change.