That would be amazing to be that high and that exposed. A 5000' zipline would be a great way to get down.
I worked on towers for UNR-Rohn for 4-1/2 years as field engineer. Never went over 800' but there were no elevators, it was hand over hand the whole way.
It's cold and windy even on calm days, when winds aloft were predicted over 20mph nobody went up. My job was waveguide/antennae installation and adjustment so I never had to go up on the light spike... but I did a few times anyway just to see how it felt.
Most guys clip in with a ladder hook while they work but climbing free as perfectly normal. It feels pretty safe inside the lattice... that's guyed, not guided or gided like the video says. Outside on the arrays I always tied in, too freaky not to.
The crazy fools are the ironworkers on tower construction crews, it's amazing to watch, they almost NEVER tie-in and walk 4" angle iron like it was their hallway. And talk about big heavy stuff swinging around that can mush you...
The year I started there, Rohn had a 1900' guyed tower in Houston fall as they were putting up the permanent arrays. The attachment hardware failed and a huge array fell into one of the guylines and the thing collapsed like an accordion, 5 ironworkers died. The videos are probably on Youtube somewhere by now. As a climber, not fun to watch, I don't recommend it, even if you aren't squeamish.