I guess for me, once they're nearly two years old, it's no longer about 'I need you' or 'mantra' cry... it's the difference between "This is a tantrum because I am upset and furious that things aren't going my way", or "this is too much for me, I am so upset now I'm not going to be able to recover from this." I hope this isn't controversial but for a two year old who knows how to sleep independently, I really just don't have the same concerns about volume and duration of crying than a baby, or a little one who's being left as a means of sleep training (yk? Like if they don't already know how to sleep independently?). Stan was this age when we finally got to the end of a year of BRUTAL EWs (pre 5.30am just about every day since 10months old, nothing would fix it) and yeh, I left him to cry. I called out to him that it's sleep time, mummy's asleep, daddy's asleep, he needs to sleep. But I knew he wasn't in pain, wasn't afraid, was just cross and having a big tantrum and this wasn't something I was prepared to negotiate on at all, any more. It took 3 nights.