I heard this a lot on our last few cruises. On our last two cruises we were the only platinum cruisers. Most of the ship was first time cruisers. Many of the ones I talked to said this was a big splurge for them and I got the feeling they were one and done. Our table mates went all out with expensive excursions. Their kids were young teens and they were definitely one and done.
I'm not sure they enjoyed it as much as they thought they would.
I think DCL will continue to fill the ships with the first time cruises that want to give their kids a Disney cruise, but I think the number of platinum cruisers will decline. We would have never reached Gold much less platinum at these prices.
We are big Disney fans. Likely have been to Disney world 15 times or more in 7 years. Booked the cruise because they're are so many options I ended up just spending the extra thinking I know I can't go wrong with Disney. I think Disney does a great job but the service is actually over the top for me. I would rather have had one dinner server instead of two and had my room made up once a day instead of twice and saved some money. We had an aft room deck 6 and the first few days it felt like be were on a pogo stick in bed from the vibrations. The weather was awesome but I didn't expect the wind to be so cold. All I could think was I could easily have saved money and likely had as much fun on another cruise line and certainly would have had more fun for less money at Aulani