I don't really see a huge benefit of RGB either. You can make pretty colours etc which is all very nice, but I'm personally more interested in ergonomics than aesthetics.

I'm happy with my Atreus too, it hits that sweet spot of being mechanical, ergonomic, fully programmable, but also readily available as a finished product (i.e. not a DIY kit). I also have a Redox keyboard which is great too. There is also stuff like the Moonlander which is popular I believe, if you want a full size keyboard and don't mind the extra cost.

I held back from these kinds of keyboards for quite a while, as they were mostly self-build projects, and my soldering skills leave much to be desired. But nowadays there are programmable ergo boards that can be bought assembled and ready to go, which for me was the gamechanger. The great thing about being programmable is you can have all your layers (including a Qwerty layer if desired) onboard, so there is no fiddling with software or changing the settings on the OS. This is especially good with my Atreus, as it's small and portable, so I take it with me and can use it should I need to use another computer.

The only real downside is that because these split ergo boards are so much better, I'd wince at the idea of having to use a normal keyboard, even with Colemak-DH on it. I can't live without my thumb keys now.

If you want to browse for macro ideas, there's a slew of them in EPKL. Both the DeadKeys and Extend files contain some of the ones I use a lot.

One of my current faves is the CoDeKey punctuation combos: I have a thumb key (the old RAlt; the RAlt itself got displaced one unit to the right) and with it followed by a home row key I get a punctuation–space–capitalization 3-for-2. I like how it saves me not only one key press but also curling down to the lower row and reaching for a Shift key. It may be an acquired taste, idk.