@redfuneral
You should differentiate between dacs being outdated from a technical perspective vs. outdated from a marketing perspective.
If you're talking marketing, I agree. Manufacturers have to always market the latest and greatest to create emotional reasons to buy, even if there's no good reason to. If you're talking technical progression, I disagree. There is nothing that has happened in the last 5 years, or 6 years, or 7 years, that would make even a 10 year old dac obsolete or even subpar. People upgrade because they want to - it's far less often that they're upgrading because they need to.