"As far as "is the filtration good enough," I'm not sure how to answer that without buying a couple brand-new engines and running them for the equivalent of ~200k miles in different conditions with different filters and comparing them afterwards. That's far too expensive and impractical a task for me to take on..."
Luckily, Toyota did it for you, running many, many engines to end of life, in all kinds of extreme conditions, and concluded that their stock filter provided the ideal balance of long term durability and performance (remember that hp numbers, and mpg are huge marketing priorities in engine development, so they push for every advantage they can get, against wear/durability challenges).
It is unlikely they left anything "easy" on the table when they were done with development, so gains from aftermarket filters do tend to come at some cost to durability. Most accessories are bought when the vehicle is nearly new, used for 30k, or 50k, and the owner triumphantly proclaims on the internet, "it works fine!", then sells the vehicle and later owners trying to get them to 200k + will be the recipients of what was done. On a rig driven on the highway most of its life, there'll be no negative trade-off at all, which is why most of the time it isn't that big of a deal.
Then, there's the question of aftermarket parts quality, vs. Toyota parts quality (referencing some air, and oil filter teardown videos on the internet showing some hair raising issues with various aftermarket filters). Is a filter the best part to take those chances with?