Is breadcrumb on google serp still in testing process?

I read some questions and articles about showing breadcrumb on Google serp for website pages. I saw that the appearance of the breadcrumbs on Google search results is controlled by Google, once the breadcrumb on your webpage structure data is detected they decide whether to show the breadcrumb on serp. Now I added the breadcrumbs correctly on my webpages, following the structure data google developers guide site and even tested my pages on Structured Data Testing Tool, it says the breadcrumbs are properly added. But none of my pages on Google search shows breadcrumbs correctly... Instead it's still showing the url structure instead of breadcrumbs. Am I doing something wrong or it's totally normal?

if it adjusts to your silo, go for it. I like to do contextual links rather than breadcrumbs.