It is important to distinguish between a package being "unmaintained" and the "software museum" concept often discussed among committers.There's a lot of abandoned ports (including upstream)
astro/rmap
astro/sunclock
astro/xplanet
audio/alsa-plugins
audio/cd-discid
audio/gsm
audio/mp3burn
audio/opusfile
databases/db5
databases/libdbi
databases/libdbi-drivers
devel/boehm-gc
devel/boehm-gc-threaded
devel/gamin
devel/gprbuild
devel/jech-dht
devel/libgee
graphics/aalib
graphics/egl-wayland
lang/fsharp
lang/mono
lang/mono-basic
lang/mono5.20
math/py-kiwisolver
multimedia/atomicparsley
multimedia/baka-mplayer
multimedia/libdvdcss
multimedia/libxine
multimedia/xine
net/nc
print/gsfonts
print/libraqm
security/mhash
security/unix-selfauth-helper
sysutils/bsdconfig
sysutils/dvd+rw-tools
sysutils/eject
sysutils/gsmartcontrol
sysutils/setsid
textproc/iso8879
textproc/libepubgen
textproc/libqxp
textproc/libtre
textproc/scim
textproc/source-highlight
textproc/xmlada
x11-fonts/font-awesome
x11-fonts/ibmfonts
x11-fonts/plex-ttf
x11-themes/adwaita-qt5
x11-themes/la-capitaine-icon-theme
x11-toolkits/libunique3
x11-wm/awesome
x11-wm/echinus
x11/fbpanel
x11/keybinder
x11/keybinder-gtk3
x11/lavalauncher
x11/lxmenu-data
x11/plank
x11/sandbar
x11/sirula
Yes, not everything that's unmaintained is really unmaintained (in tree).It is important to distinguish between a package being "unmaintained" and the "software museum" concept often discussed among committers.
An unmaintained port simply means there is currently no designated individual responsible for its oversight. However, anyone can still submit patches—similar to the NetBSD ports system—and any contributor is welcome to step up as the new maintainer to resolve issues.
The "software museum" argument, which suggests removing older ports, represents just one perspective. Many users believe that a port remains valuable even if it hasn't been updated recently, as a lack of recent updates doesn't necessarily mean the software is broken or useless to the community.