Personally, I like thicker too; and I agree that SPC cables do something special to the sound of neutral phones. I like the bass of a good copper, but I need the details of a silver. A well constructed SPC can be a revelation in how great certain iems can sound. It can unlock the potential of an already well tuned set.

My favorite part is that the OS849 cable is the entry level product in Penon's lineup @ $129 for an MMCX 4.4mm cable.

I enjoy thick cables as well, and my current favorite, a bit more affordable, silver plated 16 core cable is the $29.95 KB Ear:
https://hifigo.com/products/kb-ear-...th-metal-2pin-mmcx-qdc?variant=31605483503665
https://www.amazon.com/Replacement-HiFiHear-Detachable-Earphone-Connection/dp/B07YWK2CBS

You seem to have compared the OS849 with a similar cable - maybe the 8 core KB Ear - have you tried the 16 core KB Ear cable?

I did a full review of NiceHCKs version. All 3 actually here. https://www.head-fi.org/showcase/nicehck-c-16-cables.24002/reviews#item-review-22793. These are the exact same cables but rebranded. I agree on the affordability and I use these cables on my not so expensive in ears with great results. However the OS849 is playing at a different level. I can tell the copper and silver quality being used on the Penon cables are a much higher quality vs these budget cables. Hence the price difference. You better believe I tried those on my IT04 as well. OS849 while it is only 8 cores is actually thicker vs them 16 cored cables. I own a lot of SPC cables I am certain these OS849s are among the best I have ever used.