These are things I've found for our family - I am NOT saying younger parents haven't also been able to have these things, this is simply our experience.
We have a large house easily able to accommodate everyone/ have fun extras like a den for the kids (which I'm imagining will become a fetted room for teenagers when they're older), private bathroom for kids and us etc.
Private school for the children.
Enough money for extras for the kids activities/ days out etc, and DH and I haven't had to compromise hugely on hobbies/ dinners out and things.
I am much more comfortable in my own skin now, and with who I am. I am calmer, happier, less 'keen to impress' others, which I think makes me a better role for my children.
I now have a much wiser head on my shoulders. I don't get upset as easily/ I'm more regulated.
I had my 20's to have my responsibility free years -DH and I travelled loads, pleased ourselves for a whole decade (we married very young!!), so I don't have any regrets or pangs that I've missed out on life experiences - I now have the opposite of FOMO!
My husband and I know each other inside out and back to front. We grew together through our first decade and a bit of marriage, we were so certain that the other was 'our' person before having children. There's been no surprises, no letting each other down when the DC arrived, just an even stronger sense of being a team and doing something amazing together.
Our choice to have children later on was very deliberate - I feel my children and I met each other at exactly the right time in our lives, I've never regretted not having them sooner.
There will be a million positives to having kids younger as well - there's no right or wrong answer :) you've made the right decision for you, therefore it's the right decision for everyone.
Good luck!