Parents who didn’t sleep train at 4 months..

.. what were the consequences? I have two older kids, the first one I sleep trained and he still wasn’t a “great” sleeper until he got older. My second has a disability which caused her to be an amazing sleeper so we never had to do any training. I currently have a 3 month old and I’m considering not sleep training him. At the moment, I typically nurse him or rock him to sleep for naps and at night. His naps usually aren’t very long unless he’s contact napping, but he sleeps fairly well at night. I’m still up a few times to feed him, but he does 4 hour stretches. I’m also solo parenting for weeks at a time as my husband works away and I just feel like trying to do sleep training while my other kids run the house seems unrealistic, so I’m leaning towards not doing any training with this one. But I’d like to know any issues I could run into if I choose this route. I know babies eventually will sleep, but am I going to never sleep again if I don’t do training? Any insight and opinions is much appreciated. Thanks!! Need