Either core themes should not be automatically installed OR their presence should not be a site health issue

[zergling81]

WordPress automatically installs new core themes over time. The inactive presence of these core themes is then detected as a site health issue. One or the other of these things should not be true.

[sabernhardt]

Partly related: #48051

[audrasjb]

Hello and thanks for the ticket,

As far as I know, having more than one inactive theme is not an error or an issue, but a recommendation, like an improvement for an existing website, and it's pretty clear in the Site Health screen.

Should we only bundle the two last default themes? I'm unsure, because each theme can fit some specific needs :)

[zergling81]

The concern here is less about what is bundled with a new installation - where as you say, providing a variety of options can be helpful - and more about new default themes being silently added to existing websites when core updates occur.

Put another way, if not having more than one inactive theme merits a security recommendation, WordPress should abide by that recommendation, and not add additional inactive themes to itself over time without user intent.