[Avodah] Longevity of Minhag haMakom (was: Simchas Torah & a Lost Minhag of the Gra)

[Rich, Joel]

> 
> It seems that, despite the simple Halacha, when a large exodus (when they
> vastly outnumber the original community) of people land in a new country,
> they keep their Minhag and drown out the old Minhag.
> 
> So Ashkenazim who landed in the US kept their minhagim from the Alter
> Heim (and didn't become Sefardi), and when Sefardim who landed in the
> Ottoman Empire after the expulsion stayed Sefardi and didn't adopt the
> original Minhag.
> _______________________________________________
This is a description of the fact but not an explanation of why this was a halachically acceptable result (ie where is this exception to the minhag hamakom rule)
Kt
Joel
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