75% of those owners are still under warranty and beat themselves on the chest about 25,000 trouble free miles. Is that really an achievement though? And most of them will have the truck traded in before the 65,000 mile power train warranty runs out.
Look for rams on autotrader, all kinds of them still on the road, working perfectly fine, with no engine issues. Not sure why you're talking about original ownership because many are on second/third/fourth owners too.
V8 Tundras are not trouble free, but troubles that it does have are "a factor of what, 5 to 1? 10 to 1?" compared to the RAM vice versa? I'm talking about true work trucks here, no garage queens that never get any true use or miles.
We don't have any data that says ram or tundra is more or less trouble free. We do have sales numbers, but "trouble free" is a lot harder to define and track. As for "work trucks", Rams are used for more for work trucks than tundra ever was. Fleet sales, rentals, landscaping, construction, those are all american trucks. Tundras are mostly purchased by home owners.
Our 2012 Tundra had the terrible common Secondary Air Injection system failure. $1000 later it's fixed and riding trouble free for a while now. While the 2019 RAM already had 4 failures, each of which cost more than a $1000 to repair. That's not mentioning the DIY repairs, like it being on its third alternator for the past year.
Again, anecdotes are not data. But I do know every modern tundra (ones with turbo engines) are getting their front end ripped apart, with a new engine installed, and I'll be willing to bet a lot of those trucks aren't the same once they're back in operation.
The 5.7 hemi was used and abused for years in the 2500 (detuned slightly) as the entry engine, it's proven itself. It will take a beating and keep going as long as you look after it. There is also talk on this forum that they fixed the lifter/cam issues in newer models, I don't know whether that bears out in stats or not but I have 0 concerns about my truck puking. For a start, it was 10k CAD cheaper than the GMs and probably even more cheaper than the v8 tundra when I was purchasing my truck, so I can drop a brand new hemi in at 200k KM and carry on, coming out ahead still with a truck I actually want to drive, for all the many advantages it has over the tundra, than worrying about some 1 percent flaw that will not likely affect me. There is literally nothing the Tundra does objectively better than the Ram, that's it in a nutshell for me. The only questionable thing is whether reliability is better in the Tundra, and to that, I'll take my chances on the Ram with 0 concerns, especially vs the turbo tundra.
I forgot to mention in a previous post that I did fix the wheel bearing on the front right, it bothered me so little I had forgotten about it lol. But again if you buy a truck based purely on reliability, knowing it does everything worse than the competition, the second I have issues with it I'd be more than upset that I'm not getting what I paid for and I'd be regretting my purchase.