I've been in the fandom since 2005, when I was just 10 years old. I'm 21 now, so interesting to think that half my life has been 'furry,' haha. because I was just a lil kid when I first got into it, I guess my experience is a bit different than that of other long-time participants. with few peers of similar age in the fandom, I didn't really have any friends, so I don't have lost friendships to mourn. but I do clearly remember all the very active furries I followed online from that time period, and occasionally wonder what happened to those who have essentially disappeared.
I do recognize all the names you mentioned, Acton. I was surprised and very happy to see Neo PanTyger was around at Rainfurrest 2015. he even performed in the dance competition. I absolutely loved his fursuit back when he was a really active and popular member of the fandom, so seeing him IRL brought me back to the old days of being super young, on the internet, admiring all these fursuiters and wishing I could go to cons.
even though all the people I've seen come and go haven't been personal friends, it still does make me a little sad to think about those who have moved on. most every member of this community brings something really special and interesting to the table, and it's unfortunate to lose that - especially talented artists and performers.