I suspect they wish to cease publication of water soluble charts.
Marine charts are quite durable, even if they get wet. High quality, heavy paper stock. And, charts can be treated with waterproofing solutions like MapSeal, though that makes pencil notation almost impossible.
Is CHS planning to offer all their charts on waterproof media?
Wouldn’t it be great if they provided freely downloadable charts in PDF format, as is done by New Zealand for many, many years.
That would be fine, but not as a substitute for paper charts - which seems to be the direction that CHS is following.
NZ still produces and sells paper charts:
https://www.linz.govt.nz/sea/charts
A full-size chart is much more useful for trip planning than a set of letter/legal pages, IMO.
Starting with a .pdf.........
And then we could print those charts?? How?? Inkjet printer? Or use a commercial printing service to get more waterproof ink with laser colour prints- still on low quality paper stock?
And then laminate each chart section? Because a home-printed (or Staples-printed) chart won't last long in most chart cases on a kayak deck.
Most of those options will be more expensive and less convenient that the charts we can still buy. I've experimented with all of those options.
To see how a 'free' system works, try the US charts which are available for download - I did that a few years ago when planning an Alaska trip...it was a mess. I ended up buying a commercial 'cruising' chart instead. I have also used cheaper commercially-printed US charts when I had a sailboat. The quality was far from 'the real thing'.