I don't see your comment as a valid response to the parent. They were not talking about developing countries. They were talking about in the US. They even pointed out that most devs do not live in the SV area (in response to your statement about most people in tech...). The majority of the people in tech in the US do not live in SV and the median salary for a dev is about $100k-110k.

No. They literally were talking about 15% of $100k being sufficient. Re-read it.

15% of 400k. Your initial comment clearly said "400k is not enough to live very comfortably". That's what 15% is in response to.

You might want to take your own advice and re-read, since I wasn't talking about developing countries either. Or should we consider Western EU, Northern EU, East Asia all as developing countries?

15% of "that number" is 60K, since "that number" is 400K.

They're talking about 60K being good enough on the east coast, and 100K being very nice on the east coast.

I pretty much agree, but I think they're actually talking about the area between the coasts for the 15% number ($60k).

It's a surprise you try to defend such a bold claim, "most of tech", by kneejerking a reaction which suggests you realize there is more than the US, while your comment doesn't reflect that at all. It would suit you well to have some modesty and reflect on it.