I should mention first that I haven't played the game so I'm no expert. But I've been researching the past couple days and this is what I've found out.

It looks like they've been making the game more solo friendly the past few years. The game admittedly has far fewer players than before, but it's still going quite strong. To counter the decline in players, leveling is somewhat easier and about 3/4 of the game could be completed solo. I want to stress "could be," but probably not recommended.

Anyway, I know people are going to say, "single-player isn't the point of an MMO and it would ruin the game." Coming from a Final Fantasy fan and someone who prefers to play alone in my own time, I would love it if they remade this into a single player game in the future. Although, that probably would only happen when hardly anyone is logging on anymore.