This is a bit old and you probably already made your choice but wanted to comment in case it helps anyone else.
I went to a nursery as a child and remember not being that happy. I did make friends and learned a lot but distinctly remember really wanting to be with my family. I have a large extended family and got a lot of love from them. I have done very well in life academically but do think emotionally it took me a while to feel secure after so much separation at a young age.
My children have not gone to nursery at all or had any daycare ever, only care by family members (parents and grandparents). They are still young (5 and under) and what I notice about them in relation to other children might be helpful. They do have active social lives in groups, hobbies etc though. Also, totally anecdotal of course.
So I would say cons of no daycare/nursery:
My children seem a bit unsure in big groups. They are not quite sure what to do eg when other children act aggressively. This doesn't seem to cause them trouble as such, they don't seem to get bullied, but I wonder if it will be an issue in school later on.
They have less "friends/acquiantances" probably than the kids in big groups, however they are quite loyal to those friends
I get fed up with them at times and need my own space and they have to invent their own games. It is hard being with your children all day.
Main con is costant judgement by others but that bothers me, not my children.
Pros that I've noticed:
My children excell academically easily over children in nurseries, probably because we read and do lots of crafts and go out to children's museums and nature all the time. They get lots of one on one attention.
My children have exceptionally long attention spans and tend to be the best behaved and pay attention the most eg at library story time. Probably again because of less noise and distraction at home so they get used to really focusing on what they do and because of the one on one support. Also they don't have to worry about being left by me.
Surprisingly, they are also very independent. When I take them to hobbies, they will run off without a backwards glance. They probably crave this more because I have not needed to push independence.
They are very confident. I have heard them be shouted at by much bigger children in a football game and they were not scared in the slightest, just responded firmly and maturely. I assume this is learning interaction from adults who model this (which you can also get from a good caregiver for sure).
They are also very friendly to other children, probably because they don't feel threatened by them much. If another child is aggressive with them, I can usually help them navigate the situation. In a nursery the staff child ratios make this harder
So overall I have found not using nursery until school age really beneficial but we are extremely lucky to have the money to (just about) afford this. I also do A LOT with my children, which I enjoy and we have safe parks nearby.
If you don't have the ability to do that much or need time off, I think a good nursery is fine and not "detrimental" like some would say. But don't feel you HAVE to use one.