Where it is losing ground
Simple brochure sites moving to hosted site builders, and developer-built projects choosing static generators or application frameworks.
Where it remains strong
Content-heavy sites with non-technical editors, and anything needing a large plugin ecosystem. The editing experience is still the reason most people stay.
What it means for site owners
Nothing urgent. A well-maintained WordPress site is not suddenly a liability, but new projects have more credible options than they did.