This article is a lot more clearly written, as expected from Cloudflare. For example, the other article makes it sound like 55% of all user data was lost. Cloudflare says:

During the roughly 3.5 hours that these services were impacted, about 55% of the logs we normally send to customers were not sent and were lost.

55% of logs during a 3.5h window is a lot less of a big deal.