I'm a thoracic fusion gal, but I've had 2 sets of hardware removed. One was posterior hardware - 2 roRAB & screws, and the second removal was a lateral plate and 2 screws from an XLIF. I am happy I had both done. They were separate procedures.
The posterior removal was a comparatively easy recovery. But, I suspect there is less tissue being disturbed my level (T6-7) than at lurabar? In any case, they're just plucking it out, not drilling, sawing, and whatever else they do during a fusion. MUCH LESS traumatic. And my muscles were very happy to have that stuff out of the way!
The removal of the lateral plate was much more invasive and the recovery was difficult. Still, I have NO REGRETS. I'd definitely do it again in a heartbeat.
But, I kind of have this idea that one's body doesn't like foreign objects unless absolutely necessary. Since I was at the point of being finally fused, I was happy to have this hardware out.
Do make your own choice. But, I feel much less of the stabbing, poking, aching feelings (and triggering muscle spasms) that the hardware caused. Everyone is different.
Good luck. A second opinion might help you gain more insight.