Most companies I have used in the last few years (car,house etc) issue documents by E mail, unless you specifically ask for paper copies. It does save them (and indirectly saves you) a lot of money not having to cut down trees to make paper, print lots of documents,most of which you seldom read, ,employ staff (or buy machines) to stuff them in envelopes and lug them round a post room, and then pay postage to deliver them. .
I simply put all my Insurance documents in a special folder on my Computer. Easy to find and easy to manage. I only print off the certificate of Insurance, for use when travelling on the continent. If it were just for the UK I wouldnt even do that.
My real physical filing cabinet is almost empty.