Have you stayed in touch with ex-spouse?

[80s]

Just wondering how much contact others have with their exes when it isn't really necessary.
Our children are young adults, both moved out. We broke up 9 years ago, divorce etc. all sorted out, so no need to stay in touch. I mentioned to my bf that I hadn't even seen my ex in at least a year. He thought it was a bit odd that we don't discuss the kids at all - e.g. mentioning when one of us is visiting the kids in their town, or talking about their uni courses. But there's no need for it. This isn't unusual, is it? I'd have thought most people fall out of touch and only see each other at weddings or similar? I'm bit surprised that my bf would expect anything else!

No, I don't think that's unusual.

I have a teen ds with my ex, and we don't speak from one week to the next, except just hello when ex collects ds.

Ex didn't spend any time with ds when we were together, and now they go for a burger once a week, and that's it. He doesn't help with any decision making, never suggests anything.

This week he asked me what he could get ds for Christmas. Why doesn't he ask his son? It would give them something to talk about. Or think about it himself, put in some effort, instead of expecting to be spoon fed by me?

I gave up consulting him or hoping for any input years ago.

My ex is my best friend too, we have a young child and he's fully involved in parenting, sometimes even stays over when he brings DC back home.

I occasionally see my ex when he picks our son up from my house. (Son is 25 and recently moved back with me for 6 months to save some money before relocating). We divorced in 2015 but it was very amicable - last time I spent any time with him was DD graduation last november when we were with all 3 adult children. Before that was DD 21st birthday lunch in 2021. He remarried 4 years ago and his new wife apparently doesn't like being 'excluded' from 'family' events like graduations - she protested that she wasn't invited to DS graduation next month but fortunately ex grew a backbone and told her she wasn't having a ticket - we only got two! We will never be best friends - I couldn't depend on his support in a crisis when we were married so no way would I get any now.