> she has been preaching this for a decade, branded the term "wide events" and "observability",

With all due respect to her other work, she most certainly did not coin the term “observability”. Observability has been a topic in multiple fields for a very long time and has had widespread usage in computing for decades.

I’m sure you meant well by your comment, but I doubt this is a claim she even makes for herself.

She has been an influential writer on the topic and founded a company in this space, but she didn’t actually create the concept or terminology of observability.