Just wondering, is there a specific nusach or group who switches the final bracha in Sim Shalom/Shalom rav? I see Oseh HaShalom in some siddurim in parentheses (as an option) but the ArtScroll has it connected to “BeSefer Chaim…”
Rodelheim has Oseh HaShalom which is what I used to say. I switched because every Ashkenaz shul I’ve davened in doesn’t change from the regular ending.
Probably for the same reason they say L’david mizmor before aleinu at maariv on the yamim noraim. They adopted other minhagim. If you’re a yekke, stay a yekke.