Still, doesn't come close to popularity of GitHub itself today (https://trends.google.com/explore?q=codeberg%2Cforgejo%2Cgit...), but I think the trend of moving away from GitHub is clear both in data and sentiment, both qualitative and quantitative.
Also Google search trends are no evidence of adoption or migration. High chance of correlation, sure.
And Telegram is a lot more developed and has a much larger percentage of the global instant messenger marketshare, compared to Github vs CodeBerg.
It is not clear to me that Github's service has degraded due to incompetence, it also seems possible that they are just struggling to meet demand as the source code backbone of an internet in a critical moment of evolution. I'm not sure any single provider would fare any better.
Oracle had record revenue in its most recent fiscal year, with record user engagement. So whatever connection you're trying to establish between its fate and that of SO or myspace is off-target, both in terms of popularity and revenue.