I'm limiting my reply to alphas: Swarovski, Zeiss, Meopta indicate lifetime transferable warranties, all are for manufacturer defects.
I've had two experiences with SONA. I bought a pair that the owner damaged and for a fee they were rebuilt and upgraded to a point they were assigned a new SN.
I bought a pair of ELs off eBay. They indicated a minor rattle, I researched online and SONA has statements that some minor noise is normal. I received them and immediately discovered the rattle wasn't normal. I sent to SONA, 6 weeks later they came back good as new, no charge. It appeared an internal seal was damaged as dust was inside and the rattle was either a loose lens or prism. SONA seems to have a great reputation for being able to rebuild or repair binoculars for free or reasonable fee.
I don't have any experience with Meopta warranty, but have the S2 spotter, 8x32, and have owned the 10x42. Meopta feels like it is built for military abuse.
I own Leica binoculars. They offer a 3-year no-fault "passport warranty". This is supposed to cover accidental damage. This is for original owner. I've read statements on the birdforum where Leica has told owners the lifetime manufacturer warranty is for the binoculars, not the owner. I assume this means they will cover manufacturer defects, not owner damage. My limited experience was for the tripod adapter. The rubber strap broke and they sent a replacement strap for no cost.
I think Zeiss also has a limited duration no-fault warranty so maybe a Zeiss owner can expand.