DDDespair: For me it's about seeing how different the Ages are in each incarnation. For example, see attached image. Myst Masterpiece Edition is on the left, and had a sort of yellow-y fog for the Stoneship Age. Realmyst, on the right, changed it to being cloudy and rainy, but has a day/night cycle.
And, last I checked, Realmyst Masterpiece Edition changes Stoneship to being at night while raining. With no day/night cycle. So it looks like 2nd attached image.
I don't exactly hate it, but I had been hoping for more replication of the earlier look. So to me, being able see the Age in its various forms is, well, enjoyable.
According to the Real Myst Masterpiece Edition store page, there are still day/night cycles.
Regardless, both Masterpiece Editions are on my wishlist, but maybe I should wait for the Super realMyst 4K Championship Edition?