regarding the Pickering XSV, if something should happen to it, can it still be fixed by Stanton or is that not possible ?
All Stanton / Pickering top of the line cartridges from the 80’s can be fixed by the UK company Expert Stylus with their Paratrace profile. That comapy was the original manufacturer of the Stereohedron stylus patented by Stanton Magnetics back in the day. The Paratrace is the closest profile. Actually every Stanton/Pickering collector aware of the Expert Stylus service. My friend @nandric retipped some of the very expensive LOMC cartridges from his collection in the UK at Expert Stylus with Paratrace profile, so i think you can trust.
BUT as i said the NOS (original) styli can be found sealed even today, so no need for retip or refurbish. I have much more expensive and rare Stanton cartridges with a bunch of NOS sealed Stereohedron styli for back up. The goal of the MM is replacement stylus, we don’t need SoundSmith or anybody else to keep vintage MM alive for years. The life span of the Stereohedron stylus is twice as much than the Elliptical
BTW SoundSmith cartridges are not High Compliance, they are 22cu @ 10Hz or even lower , while all 3 cartridges from my recommended list are 30cu @ 10Hz and higher in Complinace which is better for such a light mass tonearm (the OP said it’s just 4g)