Imagine for a moment if you will

[Enkidoh]

Level Cap
What if with all these Expansions we have now, the level cap never went past 50.

We know what that was like. It was called FFXI.

Specifically the Tanaka-era FFXI, the level cap was stuck on 75 for eight years and three expansions, once he left in the wake of the FFXIV 1.0 launch debacle in 2010 and a new team was brought in the level cap quickly was raised every few months to ultimately 99. When the level cap was frozen on 75 for so long, the game ended up going stale, not to mention rock hard with most content outside of levelling virtually inaccessable unless you were in the minority elite endgame community with their spreadsheet strategies and exploiting certain gear. Thank Azeyma Yoshi made sure to avoid this nonsense when he took over the helm of FFXIV from Tanaka and designed ARR.

FFXI's level cap being raised along with new additions like the Trust npc fighter system made the game so much more enjoyable and bearable. And it's the same here in FFXIV. The game simply has to grow and cannot remain static for too long as content goes stale rapidly otherwise.