Breadcrumb navigation question
 

Is it still considered a standard to leave the page a site visitor is currently on unlinked when using a breadcrumb type navigation structure on a page?

Any advantages / disadvantage of actually linking the current url in the breadcrumb text other than the potential SEO opportunity?

So either this:

Home > Sub Dir > Current Page

Or this:

Home > Sub Dir > Current Page

Which option is still considered the norm and which do you prefer to use and what are the benefits (if any) of each?

you mean category not sub dir if you are on wp. i do mine just like that. you can check crumbs in google console

I'm not, I mean sub directory.

yes the benefit is the post/listing or whatever will be structured

Instead of trying to pander to whatever Google may or may not want, pander to what users will want.