The first link is full of youthful anger (and a bit of cringe) not recognising the immense technical debt C is carrying. It is a 50 year old language written on a PDP.

For example the author rages about things like integer sizes, while every single serious C programmer does not use ambiguously sized types.

Sure, C has issues. A lot. But it is the cornerstone of our technological marvel. Everything around you runs C, everything in space runs C as well.

Do we have much better options for some applications nowadays ? Of course.

Will C go away ? No.