Right - going towade in as I keep readin this thread!
I do think that this question is a bit pointless tbh as it can only be considered with the benefit of hindsight. So, for instance, Carrots, it may be that your daughter is coping so well with and enjoying the state comp because she learnt to "learn" and have a positive attitude towards schools as a result of her "very academic" prep. Who knows? Fact is, she's happy now and that's great!
Surely, we all just choose the best school for our child depending on the circumstances we are faced with at the time - how much money we have at the time, what the child is like, what the local schools are like, what our own attitudes and backgrounds are etc etc. TBH, I am a bit
at the idea that anyone wouldn't choose in this way! if you are choosing private school not based on what you think is genuinely best for your child at the time, the I guess you might well look back and think it was a waste of money if it went "wrong". If you made the choice faced with the circumstances and just doing what you thought was best at the time then, albeit the circs have changed since, I find it hard to see how you could "regret" the decision.
I am of the "would never dream of anything but private" type if I am totally honest, but I really would move away from that if my circumstances were different. Basically, if I couldn't afford private, obv I wouldn't consider it!
Also, I agree that very few people can afford private just by economising - there are some people in that cataegory and I guess it just depends on priorities. Mine would be paying for school, but then that's becasue I am (possibly wrongly) already hugely skewed towards choosing private just becasue of my background etc.
I do think its easy to get trapped in a bubble of perception. For instance, I would estaimate that 85%, or more, of my colleagues were not just privately educated, but went to good public schools. Obviously that is a bubble!