I did a lot of research on Tundras. My buddy has one and it's a fine truck, runs well. That being said, there's an issue that could potentially affect any Tundra's made since 2007, cam shaft oil leak that requires open heart surgery to fix. A huge thread on the Tundra forums about it, looks like Toyota just never bothered to fix it, even in the 2021 model.
So that, plus how inefficient it is, plus how relatively ancient its tech is...F-150 all the way.
I can only speak from actual experience , having owned a 2007 Tundra for 12 years, zero issues, two good friends have had their Tundras for about 10 years, also zero issues. All three vehicles operate full time in a harsh climate that sees temperatures below -40 every year. Ford has been plagued with long term issues like cam phasers, which are much, much more common, and that hasn't been fixed, which was why I was hesitant to buy an F-150. But you are correct about ancient tech, that is what finally swayed me. Then again, I expect the 2022 Tundra to be a class leader again, but that will only last a few years, as the next Tundra update will likely be another 10+ years off.