[gowld]

That's reflection not generics. It's mostly the same denotational semantics, but much less efficient performance.

[mirkoadari]

I think it's more than that. You wouldn't commit code that doesn't compile. Your entire organization, however, will troubleshoot the code that fails on runtime in production.

[tree_of_item]

It's not the same semantics at all. Using the top type is not even close to using a type parameter.