I'd like to propose one migration:
let's replace "rxvt" and "rxvt-unicode" with dummy packages pulling current
"rxvt-unicode-256color" (renamed to the base name or not). Same with
"aterm" whose changes have been merged into "rxvt-unicode" ages ago. These
have non-negligible popcon thus should be transitioned.
Preferences of this kind ossify and are hard to change, even nowadays you
have old people running rxvt because it's what they're used to.
Why -unicode, that's obvious. Here's why -256color: thanks to a misdesign,
there's no way to detect 256 color support nor the used palette and trying
to use it when not supported results in visual breakage. All other
terminals support that nowadays[2], thus programmers sometimes print 256
colors unconditionally.
Vanilla RXVT is dead upstream since 2001, that "new upstream" upload in 2013
was switching to a beta from 2003.
George (rxvt maintainer): would you be ok with this?
[1]. Indygo/Indy were made of pure awesomeness, especially their displays.