I haven't read anywhere that paper charts are legally required, just up to date information. Your CAA chart is usually in need of updates by the time its published.
For VFR Skydemon charts continually updated on the internet/wi.fi.
For IFR we use Jeppview approach and area charts all off the I Pad too.
Backup I pads always carried of course, and charging facilities plumbed in the aircraft.
I recently observed an EASA A380 flight deck, not a paper chart or manual in sight.