[signaluser]

Google trends is a good proxy for usage. It's not the whole picture but a good start.

No need to point the obvious

[kstrauser]

I don't think it is. Here's the trend for Facebook: https://trends.google.com/trends/explore?date=today%205-y&q=...

Meanwhile, at least some sources claim their numbers are still slowly climbing: https://www.statista.com/statistics/264810/number-of-monthly...

[signaluser]

https://trends.google.com/trends/explore?date=today%205-y&q=...

Telegram on the other hand keeps growing