Just to be clear, OpenWRT isn't 100% abandoned, but it's basically just a handful of sporadic package version bumps and backported bug fixes, which might not ever make it into an official numbered release. If the counts on GitHub are accurate/comparable, LEDE has almost 2000 more commits than OpenWRT. The OpenWRT website also seems to be semi-abandoned (the front page has had a spam post on it for over a month; it looks like it was moved there accidentally by a moderator intending to move it to a "trash" subforum).