My mother receives round robins from a family friend who did live in the same street but moved overseas. She has received these for the last 20+ years, and so we've been annually updated about about their lives.
While this type of letter, is good for those who do not correspond very often and the same words are meant to be sent to many people, it is not really the best form of letter for
regular (well, annually is regular) more frequent correspondence. I haven't sent, I don't think, this form of letter as I believe in tailoring my correspondence to the recipient. Having said that, I do not object to receiving this type of correspondence, if, like the first one mentioned, can add on a bit just for me (the recipient).