My home inspection of Speedmaster heads

PBR or the other experienced porters, what do you think of the spark plug threads exposed in the chamber? On the set I had the thread ends sure we’re sharp edged as cut. On the TF’s they are rolled over smooth. No big deal and just a cosmetic detail or?

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So I wonder if the reach of the plug or the threads of the plug would cover those endings up and then really be exposing the plug?..