it is very intelligent, to set things in way, that if an user loose the private key , it may be recovered only accessing in the own account which is not possible to enter without password (that is lost )
it is evident, than an user not able to access own account, cannot get access to the private key

I think 3 things had to be done

1. inform previously users to export private keys,since it will not be possible to recover password because the private key
2. however making automatoic this exporting
2. inform users the 16 phrases word would be changed..
3. change the 16 phrases word with an intelligent way (of courseit is difficult for some programmers) for example taking 12 of those 16

but it is too difficult....too many neurons engaged

the words of 16 phrases word, are on that list  BIP39
if I cannot acces to my wallet, I cannot switch anything...a part this what are the single steps for switching? where to press, what to press,
what is a private key?   the memonic word, .... the password .... or the 16 pgrases word?

Good morning, I tried to access to my wallet open in 2014 in this blockchain.info
but I have not the password


so I clicked on need help option
but it is asked me to enter a 12 word phrases, while I have instead 16 word phrases

How to resolve?

thanks for any help