I heard a story about Rabbi Yisrael Salanter.
He was to be Shliach Tzibbur on Yom Kippur (no, not that story!). Then he realized he had forgotten his Tallis at home, so he requested someone go get it for him before he starts. One of the congregants remarked that a Tallis was not obligatory, and the community is waiting, so he should start praying first, and when it arrives, put on the Tallis then.
Answered Rabbi Salanter: We no longer have the Pnimiyus. Should we lose the Chitzoniyus, as well?!
Assuming the story is even true…