My reliability issue is probably as important in my own driveway as anywhere. Broken down cars are a pain in the ass. I don't like the stress and frustration of leaving my car for work even if it is warranty work and I'm only out the cost of an UBER for a few days. The value of not having to think about it is hard to quantify, but it's very real. It becomes a lot more important when you've also driven some cars with really bad reliability.
I love the idea of a 70 series, but I kinda go back and forth on whether I'd actually buy one. I don't drive an 80 series for a lot of reasons. Most of those also would apply to an LC70. So... I like to say I'd buy one, but I don't know if I actually would unless it came with the 1VD-FTV. Then probably. But I'd also still rather have the 1VD or a modern replacement in a 4Runner or GX.
I like the 70 Series, but they are not safe. Hell, they barely got airbag in the 70 series pickup in AUS due to lobbying from miners. The 200 series is the strongest vehicle Toyota has ever built (Toyota's words, not mine). And the crash testing that ANCAP did shows how safe it is.
There is no chance that Toyota brings a SFA back to the U.S. market. It is a pipe dream. I'd love a redo of the 80 series though. It was truly an amazing rig. IMO, Toyota had a miss with the FJ Cruiser. I wanted one until I drove one. Bad visibility was the biggest issue. I think Toyota should bring back a wide/long wb version of the FJ40 to compete with the Jeep. Again, a pipe dream, but Jeep, with its known decline in reliability (based on documented defects), has continued year over year increases in sales. There is no one to compete with them. I like the 4R better, but it is a completely different rig...
With TNGA, I do believe that there is a good change the Tundra and LC will share the same frame, with the Tundra getting advances/strength from the shared frame design. The question is, will there even be a 300 series LC at all in the U.S. Many rumors state that only the LX will continue in the U.S.A., similar to what they have already done in Canada.

uke:
I don't love the idea of a twin turbo, but it has been reliable so far is the LS 500/LC Coupe. I'm sure Toyota does major testing before a switch. But I love the performance of the 5.7, and they have been very good motors.
I currently have two 5th Gens (2012 and 2020) and have had two 200 series (2011 and 2016) and would take the LC any day of the week. They are just solid rigs. Thankfully for my pocketbook, my wife prefers the 4Runner.