I've seen about 1000 of these posts in the last 24-48 hours :P
People are REALLY freaking out over this announcement, but I don't really understand why... they made almost the same announcement back in November, 2014... here's the link: https://www.facebook.com/business/news/update-to-facebook-news-feed
People freaked out then too, but it was a huge change to the news feed algorithm.. and they've been tweaking it ever since, towards a "pay to play" model, while still rewarding pages that create engagement with their followers... which is why I don't get why people are shocked when Facebook says "people making posts that nobody reacts to or comments on could see the biggest decrease in distribution"... well, duh.
That just feels like business as usual to me.
What you need to remember is that Facebook, Instagram, etc. are all focused on increasing the amount of time users spend on their platform... in 2018 getting engagement from your followers is going to more important than ever.
I think it is a good change. I don’t even use Facebook that much anymore because of all the false news and ads.