I agree with this sentiment BS but, if you were visiting an estate without a rifle and there were two on the table giving you the choice for use on red or sika stags, one a 243, the other a 270, identical in all other aspects what one would you pick up?
I have also used a 243 a lot, pluse centre fire 22's, 25-06, 270 and 308.
If a guest turned up on rutting sika stags (I know that is not what the OP was asking, just a point I'm making) with a 243, I would be trying to politely coax them into using my 308.
Having said that, I have used the 243 when owning nothing else and never really given it much thought???