Well I'm finding this thread to be very interesting. I'm a recently retired science teacher and new gun owner and wanted a gun for home defense, practice at the range, and carry. I just loved the hours spent researching online and decided on a Sig P365XL with Holosun 507K and Phlster AIWB. I'm in love with my new hobby and feel more confident to protect my family if needed. One nagging thought kept me from feeling comfortable carrying aimed at my groin with a round in the chamber like I know I should. After hearing so much about internal safeties I decided I needed to take a deep dive into that subject to regain confidence. What I found about the Sig didn't reassure me for the same reasons as the OP, no redundancy if the back of the striker were to break. Then I discovered Glock. Wow,wow,wow. Their design with several redundancies convinced me to change my whole setup to a 43X mos with the 507K and a new Phlster to fit and I could not be happier and more confident with my decision. I understand not everyone feels the need for that degree of safety design and if I didn't carry appendix I wouldn't feel as strongly about it. Come to think of it, I guess I do have redundancy with an extra testicle. Hmmm.