Revived in 1980 for the acoustic set they did prior to kicking off the main gig at the Long Beach concerts. Revived in 2013 for a few reasons I would guess: slow and acoustic; from early in their career; the only song they ever wrote with every member of the band; and it requires minimal participation, allowing just Don and Glenn to perform it and build up the team from there.
It is one of my all-time favourite Eagles songs, I love every nanosecond of it, so I am pleased it has tread water for so long. It has a real CSN&Y, SoCal feel to it, and the simple guitar and layered harmonies make it a fine example of easy listening, country pop; which is why I guess it made it onto Eagles Live amongst all the other hard rock and HC-era work.
https://www.youtube.com/watch?v=n7FgtqYbhWU
I looooove the mandolin in this version!