The Marie Kondo technique has been developed by the self-proclaimed declutter over years of obsessing with tidiness and consulting with clients. At the heart of the technique is the emotional engagement with items a person has hoarded over years.
When tidying, she insists on getting all items of the same category together - all clothes, all books, etc. She then asks her clients to pick up each item and question themselves “Does this bring me joy?”. If it doesn’t then it is thanked and disposed of.
Personally, I love the thanking part of this technique. We all too often treat items with little respect. This in turn cheapens the effort of creating an product. Think of the amount of elements that go into an average TV. Its a mind-boggling effort of resources and logistics. Something like that should be treated with respect.