First DD was a horrendous sleeper. We had a couple of attempts at sleep training but they did not go well (she is the world’s most stubborn child). I caved in to co-sleeping although I really hadn’t wanted to, and found we all got much more sleep. Gradually between about 18 months and 2 her sleep improved and she transitioned to her own bed. At 5 she goes down no problem - likes us to sit with her until she’s asleep but that doesn’t take long, and she’s accepting if we can’t. She occasionally wakes with a nightmare and one of us will spend a few minutes resettling her, and she does occasionally sneak in to the bottom of our bed in the early hours but it doesn’t wake us. Generally sleeps 8/8:30-6:30-7. She’s never really needed massive amounts of sleep - could have a very late night and still get up at her usual time and be full of beans, and as a baby never seemed affected by her shit sleeping.
DD2 (9 months) is a totally different ball game. Loves her sleep, naps no problem. I’ve co-slept from night 2 when she wouldn’t be put down in her Moses basket, and she pretty much sleeps through, occasionally stirring for a quick feed but I barely wake. She’s a much more easy going baby and would probably respond to sleep training, but I’m not planning on bothering. Will just go with the flow.
My DN was sleep trained and while she did start sleeping through for a bit she now at 9 likes to be in her DM’s bed as often as she can.
Both my DC are flat out at the minute. I’m wide awake resorting to MN as I can’t sleep… I was sleep trained.
That’s quite a long way of saying it’s not a problem not to sleep train. If it works for you you may or may not get more sleep in the short term. In the long run I’m sure it’ll make no difference. I work with sleep disorders and I’ve yet to see a referral for an adult who can’t link their sleep cycles and needs to be rocked to sleep every few hours because they were never taught to self settle.