Being able to remove them is nice for several reasons like if you wanted to sell them,repaint or repair slider damage or any reason they might need to be removed.
My friend who is a frame and body guy recommended bolt-on for the reason if you do hit something hard it's better to have a give point since it's easier to fix a little rocker panel damage vs bending the frame with too solid of a weld on the slider.
If you're going to sell, just cut, grind, paint. It's off. Not a big deal.
If you're taking a hit hard enough to bend the frame that's attached to the slider, a slight tweak is the least of your worries (and with a hit like that, the rocker damage won't be "little"). That's gotta be one HARD impact. I have never seen any hit that hard nor have I ever heard of the slider causing frame damage from being on there too solid.
Strength wise, there really is no difference. Plenty of vids will prove this. If you wanted to, you can make a "weak point" on any slider. But I don't know why you would nor anyone who has done this. Even with a bolt on, people tend to secure it as solidly as possible. This is a place where you don't want a weak spot.
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