This is purely anecdotal, so as take it with a grain of salt:
I had horrible back pain a couple years ago. It was a recurring issue that was irritating at worst until in March of one year it got so bad that I couldn’t sit for longer than 5 minutes and it was a horrible painful effort to get off of my chair. I suspect that I have sciatica as it runs in my family. I was using a pretty basic office chair that I got from Staples and it was a BIG contributor to my back pain.
So I decided to take a look at gamer chairs, because despite as goofy and lame as they look I knew that countless Twitch streamers are sitting in them 8 hours at a time every day so I figured they must be built to at least partially accommodate marathon computer usage. I took the plunge on a $300 DX Racer and it’s honestly one of the best purchases I’ve ever made. I haven’t had a painful episode since and I suspect that its stiff backrest plays a large part in relieving some of the strain by maintaining my posture. I think they’re at least worth a look.