[Avodah] Tefillas Mincha Voluntary?

[Moshe Y. Gluck]

R' Liron Kopinsky:
I heard R' Yonasan Sacks (of YU) speak in LA a few months ago and he said
that he thinks we have a Kaddish before Maariv Shmone Esrei davka to be a
hefsek to show that we hold Maariv is "reshus" (whatever that means) and
therefore not required to be connected to Geula.
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Tosfos (Berachos 4b, D'amar R' Yochanan) brings this opinion down, and
disagrees with it. Ayin Sham.

KT,
MYG