Ironically I started using a straw after all the straw-debate kicked off - it's made a significant difference to my less-dodgy right shoulder/arm when nothing else is helping. While I can use silicone, I can clean it a bit myself, I have a Kim, it can't change angles at all.
The issue is less the ban, and more the attitude and the lack of proper consultation with disabled people. People are already being told "we have no straws" when they request one and disablist remarks "you don't look disabled" or "are you SURE you need it" all of which is classic scrutiny of disabled lives which non-disableds just don't get. Why not say plastic straws aren't banned but not to be given out automatically?
Many people I know have and do switch to alternatives, but sometimes they forget (cos the amount of stuff some disableds have to haul around is immense), or they need the plastic angle-adjustment. My immune system isn't especially dodgy so I am taking the risk of the inside of my silicone one being a bit dodgy, others can't do that, or they don't have the care hours/support needed to clean them.
I saw a mention of feeding cups etc, they aren't as good as some kinds of straw, which was originally a medical item introduced in the 50s or 60s I think. I recently saw a stat saying 1 in 5 deaths of people with learning difficulties is related to asphyxiation from liquid on the lungs, the sort of thing a straw can help with massively - IF available.
It's the attitude surrounding the ban and tokenism leading to disablist nastiness I object to the most. I'd like to see plastic tat in shops, balloons and fishing waste regulated against much earlier than essential medical items which used to be easy to get and now have become hard.