Best explanation I've seen so far for Hemi cam/lifter failures

Regarding oil pressure:
I just bought a 2013 Ram 1500 5.7/ZF8 yesterday with 136k on it. Previous owner bought it at 100k miles and in 15 months put 35k+ on it driving from Idaho to Montana a bunch, so mainly highway miles recently.
Engine at operating temp runs 36-37psi oil pressure and cruising on the highway runs 50+psi.
Also has very little idle hours.

It HAS the lifter tick…. Only at startup for about 30 seconds then it goes away. I’ll likely do a cam swap/MDs delete this summer on it sometime. I don’t think it’s an oil pressure issue….

064CA148-E098-4C7F-A56C-A8F7B1CA8FA8.jpeg

F08F30E6-839D-440B-B684-2485F73C506A.jpeg