My back has been bad for years, permanent injury on right shoulder so doesn’t affect mobility too much, and bass on strap isn’t a bother.
But it’s been bad over the last couple of months where I’ve annoyed it at work by lifting something, so have been seeing an osteopath. It’s not fixed yet but best I’ve felt for a while.
I gigged a couple of weeks back on guitar and wasn’t too bad, fortunately my gear is small/light/modular so can do it all in many trips one handed.