The weirdest thing for me was how long I've continued to feel uncomfortable recycling/binning the post, instead of putting it in my Visa Application File, and switching off paper statements! Going to paperless again felt like a scary huge step. But I don't need paper statements anymore. Yay!
I still horde all my paper statements. Heck, I still have all the supporting documents I originally submitted in 2010 for the initial spouse visa application. I just can't bring myself to bin any of them - even for an old USA bank account I no longer have!
My employer has recently announced all payslips will be going digital, and I had this little heart flutter.
That being said, I have to have a DBS check every 2 years for my job, and they always require an original recent official post item. So my anti-tree crusade is still kinda justified.