[Avodah] Question regarding "hoiche kedusha"

[Micha Berger]

On Sat, Apr 30, 2011 at 11:27:28PM -0400, Zev Sero wrote:
> Lich'ora it's related to kedusha; why should a bracha in chazaras hashatz
> be any different from what it is in the silent ShE? ...

The use of LeDor vaDor is a compromise between two nusachos. Rather than
let the EY variant die altogether when we accepted siddur R' Amram Gaon,
we use it in Chazaras haShatz. (Similarly, Oseh [ha]Shalom at the end
of Birkhas Shalom and a number of other examples we discussed way back
in vol 6.)

The switch was not due to LeDor vaDor being written to continue the theme
of Qedushah. I therefore don't know if your assumptions about the rule
should hold or not. It might have been more arbitrary than that.

Tir'u baTov!
-Micha

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