Spark plug condition

Hard to see, but I see some very positive things!

Nice big gap.
Centre electrode is Platinum, which is why it is small...allows a bigger gap.
Not sooty.
Heat range 4, should give excellent idle quality, commensurate with the parts combo.
Take no notice of blackened threads. So many variables can affect this: where the last thread ends [ does it stick out of the head a bit or slightly recessed in the head ], how good the cooling is around the plug, etc.