You can get the Ultimate Collection of FFXI, including the latest expansion Seekers of Adoulin, on sale right now.
For the XI folks who quit when Abyssea came out, I encourage you to try Adoulin. It has some of the things we loved about ToAU, including a variety of content that drops great gear, gear that can be purchased with incremental progress, and massive server wide boss fights called Wildskeeper Rieves.
For anyone who never played XI but likes XIV, you can give XI a shot. The graphics are obviously nothing like XIV, but the menu based gameplay feels like class FF and it scratches a different itch than XIV does.