Naw, just nothing there to discuss. I occupy space in your head rent free... Heh, heh, heh....
Well, you can state that, but it's just not true. We could get rid of most coal usage... and we'd be better off for it.
You saying something is not true, doesn't make it not true.
The steel production, and cement production is heavily dependent on coal. Sure, heat can be generated also by natural gas, which is easier to transport and burn, but technology for consistent combustion is not there yet.
The steel and cement production require higher radiative heat transfer that coal provides. Natural gas simply doesn't have that because of sharper burning characteristics and also lacks dissipation of heat.
I do automation and process control, and I've been involved with numerous projects of setting out automotive ovens, air supply houses, steel heat treatment processes, with experience that got me to one of four test projects (that are offered and I know of) in attempts to convert coal to natural gas. None of them proved consistent trend in production and wend back to design table.
But hey, what do I know, you... the expert, are saying it's not true.