The last link listed above does say that the Atocha-Chamartin link is "completed", but that's not quite the same as being in service.
It also shows load testing taking place on the Teixeiras Viaduct on the route under construction between Puebla de Sanabria and Ourense on the Galician AVE line.
This 2019 piece shows some of the other works on this line, which is set to open Dec 2021.
Building the AVE high-speed line to Galicia | ITRANSPORTE (revistaitransporte.com)
No, not yet. There is a
blog in Spanish (google translate works fine) explaining the Madrid situation, written by someone very knowledgeable about Spanish railways
Very interesting blog, it's evidently a lot more complicated than at first sight.
Google Translate doesn't work too well with technical stuff.
I was mystified by the term
Bath Sales Knot, until I realised it was its attempt at translating
Bifurcacion Venta de Baños.
It's even worse at translating from Hungarian...