This is a feature I have wanted forever!!! Sometimes the relevant comment you want to pass along just doesn't make enough sense without its antecedents, but frequently those are simply lost in a deluge and there's no easy way to filter out the other stuff.

For those who want the rest of the comments to be available, does the

"you are viewing a single comment's thread.
view the rest of the comments →"

label in the linked reddit example satisfy your need to know there are more related comments and access them?