I was considering few use cases where arena would make sense and I encountered the "abandoned" arena library in the standard library and then read on why it was never enabled. And yes, in those extremely rare situations, it would be nice to have them. But generally, they make little sense for Go and projects Go is used in. So I definitely do not share any of the opinions from the blog post.

There is Odin, Zig or Jai(likely next year) as new kids on the block and alternatives to the cancer that is Rust or the more mainstream C, C++, Java or even C#.

Go definitely does not have to try and replace any of them. Go has its own place and has absolutely no reason to be fearful of becoming obsolete.

After all, in rare/extreme cases, one can always allocate big array and use flatbuffers for data structures to put into it.