"Hate to chuck it all, but in this day and age it’s no longer any sort of useful."
Depends on the updates. I have run most of the AICW with 20-30 year old charts.
The landmarks don't change the dangers don't change all that changes is there are far more markers spaced closer together .
Pretty easy to put a line thru the position marker number and pencil in a new number.
We travel at a lazy 6 1/4 K (bridges willing) which works out at 60-70 statute ICW miles per day , and have all the past anchorages marked for the long and short days.
Have the Loop charts , 10+ years old free , just PM in the fall, and expect to pay for postage.
Or stop by if transiting lake O. to the other coast.