Has the port collection become to large to handle.

[fbsd]

"As a port maintainer, it's quite enough work to keep things in sync
with one
ports tree without having to also worry about a second "convenience"
tree
that will only benefit a few users."

This post says nothing about a second "convenience" tree.
Talking about a (to use your term) "convenience" category
which fits nicely into the category schema all ready being used.

Please read the original post more closely so your comments
pertains to what was posted.