@Callimomofgirls - I didn’t hear about this “uproar” at Deerfield. As you know, I try to be objective about the pro’s and con’s of all schools (except Choate, because I can’t help myself 
as I love the rivalry) and have even been scolded by lurkers for not always being “in line”. I believe Deerfield did a great job managing the COVID crisis, keeping the kids & faculty safe (very few cases), weekly testing, great facilities that were built, and the $10 million dollars spent to make the school continue in a way that is worthy of its 200+ year heritage. I did not hear grumbling about the bottom line. I do know of some students who didn’t come because of their sports, $$ issues and not wanting to spend it on BS during a year of uncertainty, and difficulty with the quarantine rules.
Generally, I think Deerfield did a great job. However…There were other issues I heard complaints about - even added my few logs to the fire on @ the Block System this year. The Block System will be gone at the end of this term…also grading and the AP tests being online the day after school lets out this year.
VERY different schools, very different communities…
BTW…I thought Andover had many parents upset with their teachers/instructors. Andover had many challenges that more rural schools did not have to face. The teacher issues was one. Here is a link to a podcast on it. There is a thread on this topic.
Here is a general story from Bloomberg on how boarding schools created a bubble and PA has a nice feature.