This won’t apply to everyone, but it could be significant if it does. I didn’t know about this until recently.
The Achieving a Better Life Experience (ABLE) Act used the structure of 529 college savings plans to create similar tax-sheltered accounts for the benefit of caring for disabled children and young adults. In addition to healthcare, qualified expenses would include education, housing, transportation, and employment support. The legislation has passed, but it doesn’t look like any states have actually created plans that you can open yet. More info here.