array[index] is insane syntax? That's all that's being talked about here (allowing array-like indexing of parameter packs which are variadic template parameters).
C++ has the loudest reactionaries to syntax changes of any language community out there. Something as simple as this has 10 complainers. Imagine if someone actually proposed something radical like rust's lifetime syntax? People would be rioting in the streets.
But also part of me thinks the people making these complaints don't actually write it (C++). Because if you do then you don't really care (you just pick it up eventually without thinking about it).
btw: you can actually write, for example, the first function as just:
auto first(auto... params) { return params...[0]; }
Unless I'm missing something - but the post is showing off the fact that you can index into the list of types of the parameters, as well as the parameters themselves (in which case you need full template syntax).
