[Discussion] Easing the learning curve for introducing generic parameters

[hborla (Holly Borla)]

@Karl

Nothing against existentials - they're great and all, but their syntax is so minimal it's misleading, and leads to users reaching for them even though there's a different tool that better expresses their intent.

@xwu

I also agree that the bare spelling of existentials is an attractive nuisance and that the way to fix it is to adopt the long mooted any T spelling, in line with what Rust has done

@Jumhyn

This would be a harder bar to clear, obviously, but IMO we should explore this direction first and only then consider alternatives if it's decided that the break would be too burdensome for developers.

I've thought about this a lot over the last few weeks, and I think the transition might be feasible. I wrote up my thoughts in a pitch that we can discuss over here: [Pitch] Introduce existential `any`