Not @
GJM (in so many ways), but I've had SIGs of all calibers and all generations, and my thoughts on the various SIG extractor types:
Internal: more susceptible to chipping/breaking if dropped on a chambered round, most internal extractor guns are folded carbon slides with a removable breech block that require more PM and are not as durable as the one-piece designs, there were some issues with some P220 internal extractors, particularly with one-piece stainless slides and/or stainless frames; some people prefer the balance of the lighter carbon slide guns.
External short extractor: generally trouble free and durable over high round counts. Easiest to remove for cleaning/replacement. I believe some newer versions are MIM, but mostly machined.
External long extractor: in current form generally trouble free, with the caveat of current SIG QC; when first released in around 2014 there were some issues with spring tension that led to failure to extract malfunctions (I had an all-stainless P226 around that time that had something like 9 double-feed malfunctions in the first 200 rounds, but was reliable once SIG replaced the extractor springs). Requires a specialized punch to remove. I believe all of these are MIM, and IIRC Todd Green had posted a pic of an early one that fractured at a low round count.
I think the reputation for reliability for the internal and short external extractor guns is based on the noticeably higher QC and better materials used in the pre-2005/6ish guns. I think the current production design is fine, with the caveat that it's current SIG that's executing them. Plus the purist in me thinks they're just ugly.