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.