Not everyone likes it, and "no death landfill" fork is abandoned.
Please make it optional (if it is not yet), thanks

No
I already answered that this is an important part of preventing lags and ditch abuse. Additionally, you can remove the landfill with drones

Maybe you could do that for Fulgora at least? With the “Fulgoran Enemies” mod, enemies keep dropping usable landfill, which can be abused to create extra buildable ground.

Yes, that's a good argument. I'll check for lava and an oil ocean.

No
I already answered that this is an important part of preventing lags and ditch abuse. Additionally, you can remove the landfill with drones

But if it's possible to get rid of the landfill anyway, what's the point? It just makes the player [if they want to build around liquid pools] babysit each planet after attacks.