Welcome back! So ALOT has definitely changed but I wouldn't spend too much time really trying to get into the nitty gritty now since by the time you come in 2024, it will all change again....
Stuff changes even in a few months time and it's always a bit of a learning curve.
Do familiarize yourself with what Genie Plus is, formerly FP+. This is now the paid version of FP+. But don't get too far into the weeds given it may be an amended version by the time you visit.
A lot of the big changes, Babsy covered for you above but again, whatever you think you might learn from reading up on things now, it may all be completely different by the time you travel. The big highlights are definitely these...
- Genie+
- no free disney bus from airport,
- mod/value resorts have non-daily housekeeping, believe it's every other day, Deluxe is daily
- parks no longer do extra magic hours....it's now only 30 min early for disney resort guests and on some Monday/Wednesday nights throughout the year, deluxe resort guests get extended evening hours.
- Mobile ordering, it's the only way to go especially at the really crowded quick service- you can wait to pay with a cashier but it can be a really really long line.
Just having a basic understanding of know that you will likely pay more for everything, I mean everything, when you come unless you get a good discount but on average, my trips costs, year over year, are about 5-10% more depending on the makeup of the trip.