Hi Paul, first of all it is not the number of Megapixels that defines the quality of the shot, that is marketing humbug, but it is the size of the sensor, of course in combination with proper glass. With sensors getting larger and larger, the size of a raw image is about to explode. Just when you think your 64 GB card is large enough, you need to go for a 128 or even 256 GB card. Now when your are a ship spotter that is not much of an issue, because getting over a 100 shots per day you may only manage on a days' round trip in the port of Singapore, but rarely even in Rotterdam. So for us the problem of data storage is not relevant, and the advantages of having the RAW data file available still gives us the opportunity to get the best out of a shot.
I have searched the web for articles that would support the reduced need for RAW photography from a quality point of view, but I could only find these capacity related issues. Perhaps you remember where yo read your story?