I propose that the site ceases ordering answers according to the number of upvotes. The default ordering should be with the newest answers on top, and a very highly visible button to order according to the number of votes.
Rationale: the current scheme makes it very difficult to propose newer answers to old questions, or even not so old questions in case one of the answers already gathered a significant number of upvotes and/or was accepted (sometimes hastily) by the OP.
When a new answer is added, most site visitors will see the question on the list, end up visualizing the accepted or already highly upvoted one and many will get impressed by this and add one upvote, not even going to the new answer.
I know that clicking on "modified ..." should bring the visitor to the new answer, but perhaps many site visitors don't, and for example on my computer it doesn't work when I am in private browsing mode on firefox (which I am always).
Also people coming to the site after a google search will be presented with sometimes very old accepted answers, and possibly better newer ones will not even be read.
In the long run, the accumulated knowledge in such a system is in peril of obsolescence;
TeX/LaTeX is special due to its great stability, nevertheless it goes through evolutions, and if the site is to keep its utility in twenty years from now, it should slow down rather than encourage gregarious voting behavior.