Rocks'n'Diamonds

I thought that indestructible elements can't be replaced by change target, but it seems that it's not the case, as long as they're also walkable, diggable or collectible. viewtopic.php?t=37
So, if indestructible elements aren't really indestructible*, why don't we also have a "replace always" type that also replaces indestructible objects?

* - to be precise, I already knew that they can be digged away etc., but thought that they can't be destructed by extended change target.

I definetly agree about this. It's the same with Custom Elements digging things, even though it may sound strange that a CE can dig an indestructible steel wall, if you specify it to be diggable by the CE then it's your own decision, right? Since indestructible CEs also can use change pages, they can change to empty space - so they aren't indestructible that way either. Then why not allow them to be diggable and changeable using extended change targets as well?

This idea would help The World Maker a lot!
There's so many RND elements which can't be placed in a room because they're indestructible! So please, some way of deleting indestructible elements would be fine