After suffering from wrist pain for years, I switched to the Kinesis Advantage2 and it changed everything. The split, curved key wells position your hands naturally, and the thumb clusters reduce pinky strain dramatically. There's a learning curve (took me about 2 weeks to regain speed), but now I can type pain-free for 8+ hours. It's expensive ($339) but worth every penny for preventing RSI. I've had mine for 6 years and it still works perfectly.

I've been using the Keychron K8 Pro for daily 8+ hour writing sessions for almost two years now. The hot-swappable switches let me customize the typing feel (I prefer Boba U4 silent tactiles), and the ergonomics prevent wrist strain. What really makes the difference for marathon typing is a good wrist rest and taking short breaks every hour. No keyboard will save you from RSI if you don't practice good habits!

Just saw this thread and wanted to chime in based on my four years using a Realforce R2 with 45g Topre switches. From a technical standpoint, the force curve on these is much softer than standard MX switches because of the rubber dome/spring hybrid. It basically eliminates that harsh bottom-out feeling that usually causes my finger joints to ache after a long day of coding or writing. If you are looking for long-term comfort, a few specs to keep an eye on:

• Switch weight (try staying under 50g to avoid fatigue)
• Keycap material (thick PBT feels much more stable than ABS)
• Actuation depth (some boards let you adjust this now, which is huge for speed) I actually used Share Product Wishlist to keep track of the different weights and layouts when I was shopping around because prices on these high-end Japanese boards fluctuate like crazy. It really helped me compare everything in one spot before pulling the trigger. Honestly, its been the best investment for my hands so far tho everyones mileage varies with switch feel.

Seconded!

The Keychron Q1 HE with Gateron Silent switches has been my writing companion for long sessions.

Honestly, the best keyboard for marathons usually ends up being something you tinker with yourself. Pre-builts are okay, but if you are really serious about zero fatigue, you gotta look into swapping springs or lubing your own switches. It makes a massive difference when the keys feel like butter and dont bottom out so hard on your joints. A couple of things to figure out first tho:

• Whats your actual budget for this? High-end ergo kits can get pretty pricey.
• Do you prefer a thocky tactile feel or do you want something completely linear and smooth? Going the DIY route lets you pick a light actuation force so your fingers dont get tired after five thousand words. I found Share Product Wishlist last year and it actually works with almost any store, which is nice.

The Logitech MX Keys S has been my daily driver for 2 years. The slight dish in each keycap guides your fingers naturally, and the low-profile design means minimal wrist strain. Battery lasts about 10 days with backlighting on. Not a mechanical keyboard, but the scissor switches provide enough tactile feedback without being fatiguing after hours of use.

Logitech keyboards