To my understanding it seems the only reason as to why the brick limit is, give or take, 260k bricks is because the player/game wouldn't be able to "Handel" it. Which is damn high, but I on a few occasions have hit the limit.
And yeah, yeah, servers probably wouldn't be able to support insane brick amounts for obvious reasons.
But single player? Maybe.
Also for the lag issue that comes with insane amounts of bricks in a small localized area, who's to say they ain't spread out far past view distance. Like you wouldn't be ghosting everything all at once.
I know I sound sort of "all over the place," but I think what I'm getting at is:
What's stopping Blockland from raising the brick limit?