I had my last baby at 43, after 2 miscarriages. Next youngest was 15 and eldest 21.
Being on maternity leave a year before needing to fill out student finance forms was good timing
, although visiting universities with a baby/toddler was not so good.
The early years were fantastic, and almost gave us a new lease of life. We hadn't appreciated how much nursery fees were though, having not had to use paid childcare with the others, and that almost wiped us out. You can't downsize/cut back when you have teens at home.
I've also had some issues with jobs I couldn't apply for, and having to go part time for the primary years, which hadn't crossed our minds. Plus moving, and having to factor in being near decent schools.
We haven't experienced the doting older sibs others have mentioned. One of the older children dotes on the youngest; one is resentful; the others ignore her. She does feel like an "only" most of the time.
Trouble is that nobody's experiences will be the same as anyone else's. In our case I was dx with cancer when the youngest was only 3 yo, and we'd not long relocated to a different county with all the upheaval that involved. Had I know that was on the cards then obviously having a late baby isn't something I'd have even contemplated.
Overall we've done things we wouldn't have done otherwise and on the whole our experiences have been positive. But only you know how it will change your life and whether it's a good idea for you.