How many presale wallets are lost ? How many Ether are gone forever ?

What do you think how many people lost their passwords from the Ether presale and how many Ether are lost forever since the launch ? Robert offers a very interesting service, he is helping people to recover their lost presale passwords: https://youtu.be/w2aB2bx6Lik?si=uwmZh6s_8t5Nsa0s

Probably only a very small group of people lost their keys a few years ago. I could imagine this problem is only going to grow in the future with lost metamasks seeds.