Here in Poland, I've already had several banks and at least one insurer send me CD-ROMs. Never heard of anyone sending USB sticks before, but I'm not surprised. The problem is, approximately no one owns a CD/DVD reader anymore, and there are no modern read-only physical media. With SD cards also going the way of the floppy, USB stick is just about the only medium you can hope most customers have means to read.

> For some things, you must use paper

Do you have a source backing that up?

Aside from the local tax collector, which insists on snailmailing me a copy of all correspondence even though they also sent everything to me digitally, I can't even remember the last time I received any documents on paper, and I'm in the EU.

Danish institutions (including banks) seems fine with PDFs.

I think that's shown by the post statistics: around 25 letters received per resident, per year.

I can't remember the last letter I received which only contained papers.

I'm asking for a source. You're just reformulating the statement I asking a source for.