Well he's kinda wrong. Debian stable is absolute. The only updates are critical ones and security. They didn't even bring the wallpaper changing patch from upstream into backports. And FYI, backports is basically what he's talking about; stable core, updated software. Look, it's still out of date, but that is because backports are scrutinised.
As for rolling Debian (testing), it gets security patches last (use sid for security on a testing system). So, rolling advantage is per distro.
The claim about you having to eventually reinstall ain't quite accurate either. At least with Debian, which supports stable, oldstable, and oldoldstable. That gives you nearly 8 years (based on their release cycle) of stability/support. Plus, big plus, you can upgrade from say 9 to 10 with apt. When a new stable is released, the Debian team actually provide upgrade instructions to minimise downtime, if you wanna upgrade (I prefer fresh installs).
Now about Arch, he's right because it's been a talking point of system breaks easily but system fixes easily. And the bottom line is that's right. The breakage and fixes often happen between the user's last update and current one. Obviously it isn't for server use and can even introduce vulnerabilities that stable systems don't experience.
If you wanna talk semi-rolling, Manjaro is the best example. It is mostly new, but more vetted than Arch, even stable.
The point is he spent 12 minutes bringing nothing useful/new to the table other than an RFC about naming.
Bottom line is stability and security are distro dependant. Debian gives me both. I get DSAs the moment a vulnerability pops up. It's stable, even frustratingly. But that's the beauty of building from source: apps align with your system usually because apps are built against it. And there are always appimages to get the latest without updating any of your system because those new libs they my break stuff are embedded in a portable FS inside the appimage. In short Debian stable works great.
That said, most users would prefer Mint and some, mainly gamers, Manjaro.
So, yes, plenty contrapoints of what's said and many examples of this thing he wants to see already existing.
I run Debian on my main machine, Manjaro on my laptop, an will be running Arch on my dedicated retro gaming rig I'm scrapping together from used parts.
I think most of this it preference. What problems you feel are the lesser of the two on a per-use basis.
I hope I don't sound elitist. lol.