Many vehicles nowadays don't have a mechanical connection to the transmission, even if the gear selector looks traditional. The gear selector in my Mk7 GTI looks "normal" but it is fully electronic.
Dodge/RAM is using the rotary selector to free up console space. However, there have been recalls and at least one death of a semi-famous person over the design implementation.
As for reliability, I dunno. I have heard some pretty bad stories about newer RAM trucks, I would guess your chances of having any multiple of issues occur on a trail in a RAM are statistically worse than most other brands, not just the selector.
My co-worker has a 2016 Ram 3500. Beautiful truck, but always has expensive issues. However, he did buy the extended warranty and has saved him a few times. The truck has broken down twice on him while on vacation, once the turbo blew at 40k miles while pulling a pop-up trailer through a sparsely populated area in Nevada, that was a $6700 hit to his warranty, and another time his wiring harness was damaged, supposedly by a rodent, whilst he was out hunting. Couldn't get back home. This last one probably not fault of RAM. But, he just recently spent $5K to have the exhaust replaced because it rusted out and his diesel emission gear failed, he ended up doing a delete because the warranty is expired or didn't cover it.
So, his RAM left him stranded twice.
Good video about new RAM, don't buy one without the extended warranty, otherwise amazing vehicle: