I wouldn't envision any changes to these. For college - only public institution will be free and how free will they be? books, room and board, laptop, etc. etc.
I jusst don't see completely tuition free in the next couple to 10 years, although greatly reduced would be great.
Same thing Medicare. retirees are paying for medicare now, and have coinsurance and/or copays. So, the HSA does not become obsolete. Other uses are dentistry & optometry including exams and treatments, braces, glasses or contacks, etc.
Many things may be not covered - plastic surgery (can you use HSA for that now?) or anything not deemed essential? non-generic drugs, LTC and or LTC insurance...