Maybe Web designers forgot the usefulness of Visited Link colours now days, no-one seems to use them.
I’m researching I click a link, I go back to page with long list of topics, when the colour of the clicked link changes to something vivid, like purple, I can visually see my history, if the links don’t change colour, I’m often clicking the same links and then later remember i’ve read this.
Please consider update the UX to give us this visual navigational feedback.
I’m unhappy that my custom style sheet to force pages to colour the links is ignored by this forum 
None of the obvious css code works here:
a:visited *{
color: #9900CC !important;
}
a:visited, a:visited *{
color: #9900CC !important;
}
a:visited, a:visited * {color: #9900CC !important;}
/* AGENT_SHEET */
@-moz-document domain("community.clearlinux.org"), domain("clearlinux.org") {
a:visited, a:visited * {color: red!important;}
}
. I suspect each theme would have to have its CSS tweaked, possibly in multiple places. So, while I agree its a nice to have, I don’t think there’s much we can do about it at this moment.