As I mentioned in a previous post, I don't like the fine coffee crumbs that get into the coffee with the metal filters for drip machines. I almost never use my drip machine anymore.
There is no problem with crumbs in the coffee with the metal "filter" that holds the grounds for making espresso with an espresso machine (the kind with a built in pump, not little the stove top espresso makers).
May you live as long as you wish and love as long as you live.
Robert A. Heinlein