The professional side has just about migrated to ECDIS. [1] Certified electronic charts with extra screens and independent power backups to make it as safe as regular paper charts in emergencies.

Almost all new ships on international voyages are required to have ECDIS and year by year it covers more older vessels.

What is left is commercial smaller vessels which tend to have a set of certified paper charts over the area they operate rolled up in a corner of the bridge and then use a unclassified electronic system for day to day operations.

Then we have the boating/cruising people, they have been electronic forever. People do not care enough about backups but it is what it is. Personally I run a large power bank and charts on my phone allowing me to navigate for days in case the boat's systems die.

All in all, the market for paper charts have become increasingly niche over the years.

[1]: https://en.m.wikipedia.org/wiki/Electronic_Chart_Display_and...