Like so many things, Disney in general and WDW in particular was on the cutting edge of advancement, whether it was technology, entertainment, dietary needs, or in the treatment of special needs children.
WDW once represented one of the few places where a family with a special needs child could actually catch a break, so I appreciate why you bought so heavily into the WDW of the past.
Sadly, the WDW of the future is but a shell of its former self. Not merely for families with special needs children but for nearly everyone else who grew to love the "old" WDW.
It now feels like the old WDW is dead. MM+ and DAS were the last nails in the coffin.