I've seen how good medicare is. It really isn't good at all.

It's cheaper and works better than private insurance right now. That's good enough for me.

Let me put it to you this way, I brought my 77 year old grandma and my 90 year old aunt in for a flu shot and a checkup.

My aunt has Blue Cross and a supplemental insurance plan through her retirement but does not use medicare. Cost to her out of pocket for the visit $40 co-pay.

My grandma uses medicare. Cost to her out of pocket for the visit $0. No co-pay, nothing. Didn't open her purse.

One of those plans cost $200 a month to maintain. Guess which.

I like the total full coverage Medicare with dental and eye care for all who want it plan. Give it a year, there won't be many left willing to pay a mint for less coverage and more restrictions, but they'll have the right to choose to be stupid.
Getting rid of the insurance industry removes at least 20% of total medical costs, but you don't lose anything else besides headaches and bankruptcies.

Are you going to elaborate on that or just leave it at a meaningless unsubstantiated throwaway comment?

Why do Americans think medicare for all will remove the private option? They are not mutually exclusive. If you want "better" than the norm you pay for it, simple.