There are many countries that have functioning constitutions that are regularly revised.
It’s not impossible for the USA to get there one day.
it is impossible and it is great that it is impossible because you need one party to basically run everything at the federal level and vast majority at the state level which means that any changes to the constitution would be heavily politically motivated to one side of the isle.
We still haven't fixed things caused by putting chattel slavery into the Constitution almost 150 years after a civil war.