The only case I can see for keeping these categories would be if it helped organise the parent decade category, but it doesn't. The largest "Category:YYY0s films" is Category:2010s films, which currently has 54 subcats. Adding a further nine subcats (i.e. one per each of the tens year, minus the deleted container) won't overload Category:2010s films, and the years will sort neatly at the start of the list. --BrownHairedGirl(talk) • (contribs) 18:21, 5 March 2019 (UTC)[reply]
Contributor's rationale: The point of decade-by-year categories and their navigation templates is to help users do historical surveys. —Coder Dan (talk) 20:01, 5 March 2019 (UTC)[reply]
@Coder Dan, how is that aided by a decade-by-year category rather than just a decade category?
Delete. If the company has sold off its radio stations and no longer has any left to categorize, then the category is no longer necessary. Bearcat (talk) 15:11, 6 March 2019 (UTC)[reply]
Creator's rationale: - I see what you're saying. My rebuttal though is that there are numerous other categories which group vehicles/cars with notable technical features or design elements and they seem to have proved themselves relevant. For instance "Automobiles with gull-wing doors", "Automobiles with backbone chassis", "Vehicles with four-wheel steering", "Vehicles with CVT transmission", and "Vehicles with wheel motors". Many of those articles have been around for over 10 years (since 2008), and even the newest created, "Vehicles with backbone chassis" has been around for 2 years and so have proved to have staying power. They all tackle niche, yet notable features, gull-wing doors, four-wheel steering, CVT transmissions, etc, that don't fit into a common categorization (classification, body style) and that people are likely to be interested in. I see no reason why hidden headlamps wouldn't be at least as relevant, if not possibly more, than those features. Thank you for your consideration. TKOIII (talk) 15:25, 5 March 2019 (UTC)[reply]
Delete per nom before we get categories for things like cars with retractable radio aerials, cars whose boot/trunk can be unlocked from the dashboard etc. DexDor(talk)21:47, 6 March 2019 (UTC)[reply]
