I've seen it too, and it seems to be getting worse as companies move more and more communication onto Slack, ticketing systems, Confluence, etc. Modern channels are a huge high velocity dumping ground. The only way anyone can even pretend to keep up with all the - frankly - spam is arbitrary sampling.

Oldschool periodic reports and memoranda weren't perfect, but they did encourage taking time to curate one's message. And gave others somewhere to go for a properly curated message.