Sorry to hear of your chronic back problems. I thought the theory was that as we age, those discs become tougher and shrink, often reducing disc bulges and pain. Apparently only for some.
I used to have extreme back pains when I was younger. But I started sleeping on the floor, sporadically followed PT's advice on exercises, and lost some weight. Back pains slowly went away. I bought a new 'extra-firm' expensive bed and started sleeping with a thin pillow under my hips to ensure lower back was fully supported at night.
Now I follow Charlie's lead, bought a Concept II
, and do a lot of indoor rowing...every stroke is a bit of traction. Haven't had a back problem in 20 years! So there is hope. Good luck.