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First and foremost, package recency. If you run stable, which is released as snapshots ala Ubuntu, the packages are ancient. If you run testing, which is a rolling distro ala Arch, they're a lot newer and pretty solid, but security updates lag. If you run unstable, which is also rolling, things can (rarely) break. Additionally, Ubuntu has decided to incorporate non-free software and drivers right into the base product, which gives a better out-of-the-box experience. In Debian this is all opt-in and requires a bit more effort. Now, I run Debian testing on my laptop, and I'm a huge fan of the distribution, not the least because Debian is the bedrock on which at least a half a dozen other distros are built. But I can acknowledge that their more conservative approach to packaging does have its downsides. |
I doubt Ubuntu offers newer packages than my Debian Sid installation.
As for drivers and firmware etc as I've mentioned below I've installed a new state of the art desktop in recent weeks and everything simply worked. From the wifi to Bluetooth to the Nvidia gpu. I wouldn't call enabling the non-free repo "work" since it's just a question to answer during the installation...