I tried 2TC two summers ago and thought it would work well for me after trying it out over the summer. Once hunting season came and I started climbing in the woods with my full hunting gear I noticed that the my bib overalls really made it a lot more work to get my feet up and in the foot loop. If I left my foot in the loop, it was a lot of work to hold my leg up to get the tether up. I would end up a sweaty mess. I've still kept the 2TC in my gear and have used it a couple times when going to a new tree with no branches to SRT and once when I got my throw ball stuck trying to SRT a tree with a bunch of limbs last year.
Anyway, I've been noticing that now that I'm in my mid 40's, I'm not as flexible, and it's actually hard to just left my leg up high to put my shoes on. I've always lifted and worked out, but I'll admit I've always skimped on stretching/flexibility. I think part of (possibly the main reason) 2TC hasn't been for me is because I'm too tight/inflexible. This thread has got me wanting to try some of the changes discussed with 2TC. I also plan to start working more on stretching/flexibility for quality of life, but hopefully that will also transfer over into easier 2TC. Not sure if anyone else has gone through any of this or not, but it's something I noticed and am going to work on.