Dated or not (that point is debatable), Toyota's designs still are considered the benchmark to beat in the midsized SUV and pickup markets. Ford, GM, and FCA had largely quit one, or both, of those markets, and just recently have attempted to make a comeback...most of them declared that the midsized market was "dead" several years back.
So the 4runner is a dated design, but other than the Wrangler (which itself is a very dated and arguably less refined design), what else competes with that Toyota product?
The Tacoma just saw a new generation released. Other than engine options, what does the competition offer over the Tacoma? Despite all the fanfare attributed to the new Ranger, the Tacoma is arguably still the most offroad capable midsized pickup, excluding the Gladiator (which really isn't a true midsized truck if we're going by size and footprint).
Toyota changes its designs very slowly, which is both its greatest strength and greatest weakness. Until the other OEM's put out midsized trucks and SUV's that seriously threaten Toyota's offerings, the company has absolutely no reason to change its approach. I mean of all places, you'd think people on Expedition Portal would appreciate brilliance of simplicity and reliability....but if you think self-parking tech, 15-way adjustable seats, and camera's at every angle are more important to your overland travels, by all means get a F-150 or Silverado.