Currently there are used:
- "Template:TNT Outdated", f.e. on https://www.mediawiki.org/wiki/Wikimedia_Foundation_Design
- "Template:TNT Historical", f.e. on https://www.mediawiki.org/wiki/Athena
- no indicators, or confusing templates like "this is a draft"
We should agree on one template for our outdated resources and at best make it align with our design guidelines.