I've been using it for many months. It has been stable.
sparc stable
x86 stable
amd64 stable
Looking good on ppc. # cat gxmessage-686196.report USE tests started on Di 21. Mai 17:02:03 CEST 2019 FEATURES=' test' USE='' succeeded for =x11-misc/gxmessage-3.4.3 USE='' succeeded for =x11-misc/gxmessage-3.4.3 revdep tests started on Di 21. Mai 17:07:44 CEST 2019 FEATURES=' test' USE='' succeeded for x11-wm/fluxbox
ppc stable Last arch. Closing.