@jubilant, that is such a worthwhile talk, and challenge that she issued-- thanks for posting something so thought-provoking!
I tend to sentimentalize "things", so I can well understand her feeling when she was holding her Dad's alarm clock, that he used to wind and use to get up early to support his family. It's been a very slow process for me, but over the last couple of years, I've been sorting and purging the extraneous in my life. Not without snags! You mention purses-- jackets are my downfall.
I have small collections of pewter, glass, and candlesticks, etc., that I've culled down to that absolute minimum, and continue to purge. Recently the kitchen cupboards felt my wrath! Luckily a local church's Rummage Rooms want constant donations of everything you can give for their needy clients, so we can bring things to them every few weeks, or at least once a month.
My inspiration in simplifying is "The Minimal Mom". Of course, she's at a different stage in life-- late 30's and has small children. But she's very savvy and encouraging and she tackles everything from wardrobe simplifying, to paper decluttering, to meal planning, to streamlining your possessions and house:
https://www.youtube.com/watch?time_continue=6&v=nVcOfpXkWXs
Thank you for your thoughtful and timely post!