This game is particularly popular in February, or so I've heard.

Anyway, I'd reckon there are two main reasons that people are still playing this game: Nostalgia, and Discovery. For many people, Final Fantasy I was a whole new concept, the first of its type. It recieved a special place in their hearts, and they continue playing it for that reson. Other people, me being one, entered the Final Fantasy world later on through other titles, and because of that, they want to discover the roots of the series.

Yet other people would claim that they play it because it's a quality game, which is a statement I can't get behind. It is, in my eyes, pretty shallow and the gameplay is unrefined. But I still enjoyed playing it, and experiencing the start of a wonderful series of games, in its unpolished glory.

The fact that a game is 2D doesn't take away from it's quality. I much prefer a 2D game with soul, a good story, and/or good gameplay to a fancy 3D game with polished graphics and nothing to back it up.

As for how to get the game... There is always emulation. If you want it on a console you're probably either going to have to pay good money to a retro gamer, or get one of the polished versions (with improved graphics, if you really can't stand the old ones), like Final Fantasy: Origins for Playstation or Final Fantasy: Dawn of Souls for GBA.

If you want to know more, there is always Wikipedia.