I bought a moonlander by ZSA about a year ago.
I found the split allows for a much more relaxed position while writing, and being able to adjust the halves individually when I reposition myself is very comfortable.
They also have the benefit of having thumb clusters, giving more work to the strongest finger of the hand.
Another benefit I find is that most split keyboards are fully programmable, which makes customizing it to your needs very nice.
The only drawback I find to this keyboard (apart from the price, which is not cheap) is that it is hefty, and not easy to transport. The fact that it is wired clutters a bit the desktop, if this is something that concerns you.
I recently built a corne low profile yo have something more transportable and wireless, but this is much more involved, as the configuration goes through writing code and not a nice UI.
However the comfort of this new board is very nice.
There was a whole subreddit dedicated to ergonomcal keyboards, ErgoMechKeyboards, which is very interesting to browse, as what I have done is seen as extreme by my coworkers, but tame compared to what some people are do.
I have a old gaming laptop that is not supported.
Intel i7-7820HK, 4cores 8 threads 2.9Ghz.
Released in 2017.
That’s not old-arse as far as I’m concerned, and I don’t see the need for an upgrade. I’m going to install Linux on this PC because I have the know-how and desire to check out how electron fares. But I can see how that is not an option for everyone.