According to people in the thread, Deuter and Osprey are still independent and high-quality.

I don't know about backpacks specifically, but my general impression with Decathlon and their own brands has been that they somehow manage to be ridiculously cheap, while also being better made and lasting longer than many name brands that cost several times as much.

My impression of Decathlon is that they also have very helpful and usually knowledgable staff. People go work there because they're into the sports!