Well it makes sense that you don't see much technology in FFX because technology is taboo in FFX's storyline.
FFX has one of the best FF stories. It is indeed quite linear, but I doubt you will finish this game faster than any other FFs. The linearity may be deceiving without taking into account the side quests and the searches for hidden stuff you will be doing.
I recommend that you play it, it is one of my favorite FFs and I have played most of them.
If you like opened world games then FFXII may be more your thing, just prepare to be flipping coins for good loot because the best stuff in the game is behind a brutal percentage chance of enemy drop.
So that's why they use volleyballs as weapons huh XDDDD .. jk
I like linear and open worlds equally and i have no doubt i will like the story but how's the gameplay,combat and exploration in your opinion ?? that's what i'm worried about the most.