You personally don't like a geek blog, but many people do. The buffer blog is all marketing (well as far as I could tell, I only went 2 pages in looking for geek stuff). I'm sure other marketers love it, but you are comparing apples to oranges.
Perhaps you should take your complaint of 37signals "that's the way to do it" and apply it to yourself? Different strokes for different folks and all.
Be happy both companies are contributing and sharing their insights, no one is forcing you to read and/or take their advice. No need for overly dramatic "37signals is dead"
More importantly, I don't quite understand what it is about 37signals that inspires such hate. It seems like the same kind of hate Marco Arment gets. Something about opinionated and outspoken bootstrappers who find success by doing things the way they want to do them instead of chasing the usual growth-above-all-else startup mentality seems to really get under people's skin.
Finally, what is this fawning all over Buffer all about? The whole article feels a bit incongruous. Comparing Buffer's future to the impact that 37s has had over the last 15 years is a bold and perilous prediction. They could do great things and still fall short of being held to such a standard. Is Buffer doing good stuff? I don't really know because I haven't been paying attention, but this article does not make me want to find out more, it just leaves me confused.
[citation needed]