No, it's not. It requires so much exp that trying to grind for anything beyond like 12 or 13 is just not worth it (honestly debatable if those are worth it). I think the highest anyone has achieved since early access released is 15 or 16, last I heard anyway.

Presumably the plan was to lower the scaling later on as the world opened up more, gradually increasing the soft cap on levels. But given the uncertain future of the game right now, hard to say if or when that might happen.

Got it, thank you for letting me know. I'm hoping they do make these achievements earnable eventually, who knows

If you've been grinding since EA launch, yes, but it'd require almost constant play in the current format, or repeatedly just server hopping to re-spam story quests over and over. 20 is at least mildly feasible, but 30 is definitely not for anything under 3+ years of nonstop focus.

Each level raises the XP required by ~61% of its new total each time (the Golden Ratio), so the higher you get the longer it takes.

XP heirarchy is: major quests > duels/kills > endeavours/entering a new zone for the first time > talking to NPCs or reading signs

I once charted out a rough gauge of XP, and at level 29, one needs about 8,000,000 sign readings or 1,600,000 kills in a row, which would require taking about 1,150 days non-stop with 1-minute gaps between them