Good comments so far. This is not a simple comparison for me.
First off, have you spent much time behind the wheel of the 80? I own both and drive my 80 more, but it’s personal preference and keeps miles down on my 4R. LC has full time 4wd which is great in the snow, but the brakes on the 4Runner are superior, especially if you’ll be towing and/or in the hills a lot. 4Runner also gets you VSC and downhill assist, if that makes any difference. And then there’s the whole solid front axle vs IFS aspect, each has their pros/cons that are situationally dependent on where and what you’re using the vehicle for.
Big advantage of the 80 from a performance aspect is the build potential, like others have said. I’m on Slee’s 4” and 37’s and feel it handles great.. for what it is. At those lifts you’re looking at new drivelines and part time 4wd conversions, chromoly axles if you’re wheeling hard, etc. 2” coils gets you on 35’s without as many issues, arguably a more “logical” approach. It’s also 20 years old and frankly just don’t have to worry about damaging it as much.
Another aspect would be the fact that good condition 80’s are holding value, if not increasing, whereas the 6th gen 4R is around the corner. If I was getting out of a 5th gen now would be a good time. You could always sell the 80 at near no loss in a year or two to get into something else if you wanted.
A 100 would be a more direct comparison imo. I love those as well; v8, better seats, same great visibility, smoother ride, massive ifs components (sans the early model diffs), similar timeless aesthetic.
Hope that helps. I wouldn’t hesitate if your hearts in it, 80’s are a pretty fluid market and like someone else said, 4Runners are everywhere.
https://m.youtube.com/watch?v=D-z2HMnJp30