I heard something interesting about ejection seats on tv.
The canopy cost up to a million dollars.
There are personnel who main job is making sure the ejection seat is working properly.
If a pilot needs to use the ejection seat, he, or she, has a 9 out if 10 chance of survival.
The spine will compress 1/2" after that emergency handle is pulled, and they said the shortening of the spine is permanent.
If I had the room, and was offered a small commercial Hobart mixer at a rock bottom price, I would buy it.
I worked at Marin Bagel factory in college, and that mixer was the only thing I liked about the job. The owner didn't like me, so when he was in a bad mood, my job was rotating the freezer. Imagine 5:30 am. Cold outside. A bakery where talking was discouraged. Climbing into a packed 10 x 20 foot packed to the door with frozen food. 1 foot of clearance on top of the food. Then rotating everything. Worst job ever. It wasn't the job, it was the owner.
Sorry about my ramble.
Now that people are discussing it, I do want to find out if there are former air force pilots reading this who can corroborate or refute my hypothesis: I suspect long-duration mission bombers like the US B-52 and B-2 have pilot seats especially tuned for extended operational comfort, even more so than commercial airliners (passenger or cargo), and it would be interesting to test my hypothesis that those would make excellent office chairs for coders. Someone makes these from old pilot seats [1], but I'm specifically interested in pilot seats from airframes that routinely perform round-trip trans-Pacific routes.
I personally wouldn't routinely use such a seat for more than say 10-12 hours at a time, but if it is proven to still be comfortable after someone uses it for that long, naps for a couple hours in it, and uses it for another long session, then it is likely going to feel very comfortable to me. And maybe the safety harness will help me maintain my posture instead of having to remind myself every half hour to check it.
Though honestly, I think it's actually a solved problem. I just buy aftermarket Recaro seats. They know what they're doing.
OEM GT sedan seats are probably your best bet. Big Lexus, Mercedes, etc. sedans.