We're seriously considering making a jump from a 22R-E powered truck to a newer Tacoma. We are looking for a 4.0L and it's specifically because of the highway. The 4 cylinder trucks just don't cut it for us anymore. Back when I bought my truck the difference in traffic speed wasn't too bad, even with the WilderNest. When my truck was built in 1990 it was really pretty average, actually.
However since then I've added an ARB + winch, fridge, roof rack (Heaven help us with bikes on top!). I also went to 33" tires, added sliders, quarter panel protecting bumper and all of it. My truck was so, so slow up hill and with any head wind even with 5.29 gearing. I ended up going back to smaller tires, gearing back to stock and cutting off as much of the protection as I could and lowering in an attempt to reduce drag. That stuff helped, but now my truck is just tired.
Fast forward 15 years and even the tiny commuter cars have such improved power to weight ratios that merging on the highway is sphincter tightening. Used to be I wouldn't worry much until I could see the dead raccoons in the Mack grills. Also we're doing more long pavement trips than just banging the truck on local trails, being so much slower is frustrating and my wife won't even drive my truck on Interstate. Couple that with having just less time to spend driving than we used to (I personally work a full time gig and moonlight), the need to just put stress-free miles down is growing. I'm not young kid anymore (mid 40s), either, so A/C will be nice, too.
The only way I would go with the 2.7L in a Tacoma would be in a regular cab with a stick shift and even then it would have be with the expectation that it's mostly for low speed use and not primarily an Interstate vehicle. More so if there was any intention to 'build' it. The roads in the U.S. are just not conducive (read that as few friendly, tolerant drivers) to vehicles that can't keep up. I dunno.