rigid body's - stand still -how?

Hello

I love to make fun with massive physics simulations (like blender 4.3 100k rigid bodys)

Many years ago it was Maya - before physx plugin (before the plugin was no longer developed)

Some time ago - blender ( but looks like 100k rigid bodys is limit for 32 gb ram)

Now i really love to try unity

But

HOW to make god damn rigid bodys to stand still ?

My simple tower is collapsing