Is your diagnosis for life?

After having to deal with my current medical conditions for over a decade now, it's made me ask myself a question, am I ever going to get any better?
With osteoarthritis in several joints, and undiagnosed neuropathy in my feet and now my hands, will any of it ever improve? Or have I received a life's sentence of chronic pain?
I don't see my situation ever improving, I'll be living like this for as long as I'm willing to put up with the pain. It's been 10 years now, and some days are harder than others. We've been struggling financially ever since I had to retire in 2015, but my awesome wife is still working 40+ hours a week to support us. How we'll get by when she retires(she's 61) is something that worries both of us.
The thought of any new medical bills that we'd be faced with if I have any additional osteoarthritis surgeries would put us even further into debt, which is something that I swore to myself that I'd never do. I'm not going to bankrupt ourselves, or our kids with a bunch of medical bills.
Unless they somehow develop a treatment for neuropathy that actually helps with the pain, or a treatment for osteoarthritis other than surgery and pain management, I'm going to be like this until the day I die.