Im working on an interactive website so anyone can check stream stats for the members of hololive.https://confident-visvesvaraya-7d1360.netlify.app/
There are also Hololive stats available onhttps://holo.poi.cat/
Im using data from that website which seems to be the only site where you can check the average and maximum viewers of a stream since YouTube apparently does not store that info. Also the data is only available from June 2020 and does not include many of the unarchived streams.
Some things I've noticed:
EN branch views have been declining since the start of this year, this trend is the most noticeable with gura since she was getting very good numbers last year.
ID branch numbers are so low compared to the other girls is almost sad