If you settle in one of the Fairfield county towns I mentioned then no point to private school, as the public schools in those towns are among the best in the nation and better than many private schools. The only thing “better” IMO are elite New England boarding schools (eg Choate, Loomis Chaffee, Pomfret, Andover, Exeter etc). Those schools cost as much as college and your child most likely will not get the best experience unless they live there as a boarding student.

If you settle in Avon, Farmington, Glastonbury, Simsbury, West Hartford etc I would still argue that private school is not worth it because these are excellent school systems. An involved parent + these school systems + eyes wide open on how the college process works results in great education and optimal college outcome. I would definitely take these schools over generic private schools or religious private schools (from an education and community perspective).

Id also say that there are other towns with “average” school systems that are good relative to the rest of the country, and with involved parents kids will get a great education still and can indeed land at top colleges.

I saw someone below mentioned attending an Ivy League feeder private school - I also did. The education was great, but it cost so much that I couldn’t afford to attend an Ivy League and had to seek a scholarship elsewhere (just something to consider…)