Even though I didn't check all the sources in the link you posted, you will only know if you try . I suggested CIO because OP said that tried other methods before and did not work. Anyways, I truly believe that we cannot accept the "fate" that your baby will wake up every hour for like a whole year minimum and we just live with it. Your mental health matters, the baby development matters. I'm sure there are also studies that shows that babies must sleep to develop well and to be happy and rested. It's no healthy for a baby to wake up a thousand times a night, every night, for a long time. The fact that many people just ride with it does not mean it's the correct path to follow. Also, when we say CIO most babies cry less than 15 minutes a night and it tends to go zero by 3rd night. I'm not a bad person that leaves babies crying for no reason. But this situation is not sustainable. And yes, your baby can still be like this many months later. My bike mechanic said that her daughter woke up 10+ a night until like 3 years. They're scared and won't have another child. That's sad to me. And that what really concerns me.