Request for advice on how to go about this: Say you have a blog. How do you have one page either show all articles or those filtered by a specific field/value (i.e. only those by a specific author, or a specific tag)? Honestly feel this is ultra basic but, realistically, I'm tired and have a POC deadline on Friday so figured I'd just ask/check that what I roughly think is correct is correct. TIA!

My go-to method would be examine. Examine is Umbraco's indexer that indexes all Umbraco pages. You can make a simple query in examine to find all documents that share similarity with your current page. Now examine has a little bit of a learning curve, so if you intend to take this direction and you're not familiar with it, you should keep that in mind

I keep thinking about this - is there not a way to do something like a LINQ query like "Given a specific [User], get a list of all child [Article] pages of this page with [User] as author"? While Examine is obvs awesome I think it's overkill for what I'm looking for right now, I think it's more of a Razor pages/ASP.NET Core thing that I'm looking for/overthinking. (but thank you for that direction!)

You'd have to find something that they have in common. If it's the author, you should simply be able to do something like this:

var currentAuthor = CurrentPage.Value<string>("author")
CurrentPage.Children().Where(c => string.Equals(c.Value<string>("author"), currentAuthor))

CurrentPage.Children<IMyAuthorComposition>().Where(c => c.Author == CurrentPage.Author);

If you need to go deeper, just use Descendants instead of Children

Will look into, thank you!

Happy to help 😊