You are right, John.
When I was flush, I made a trip with a D3, D700, 2.8 lenses, and I was a pack mule. The next trip was with more practical bodies and a bit smaller lenses and the trip after that I dragged an M43 along and left the FX in the trunk and become invisible...
Since then, it was M43 until now. What I missed was easy-to-work files, longer battery life, great high ISO files. If I were better off, I'd have a pair of each Z6 and Z7 bodies and choose my tools for my projects. But I want to simply, do with less so I went pragmatic rather than wishful this time and went with the Z6.
On a road trip, I'll probably still use the D800 bodies since the files are large and luxurious but for travel I think 24 mp is a sweet spot and my experience with the high-iso of the bodies since the D3/D700 keep me shooting in the Hail Mary lighting I now relish.
I think for your abstracts resolution isn't too critical but color is king and you'll do fine with the Z6. Even for landscape, I am happy so far with the files.
Yesterday, I traveled up the mountain to a cow-camp where my friends have had a cabin in the family since the start of the 20th century and every Independence Day they gather. I had no agenda other than to consume craft beer and eat good potluck and face time 1995 style with long-time friends (the place is about 25 miles beyond the cell-phone bars.)
I took the Z6 and a early 1950s Summarit an old friend gave me. The lens has a large, hazy, milky fog in the middle. Bingo! I created a series of cow camp portraits inside and out with this etherial lens and it's hazy, asymmetrical age fog. Totally different than the 24-70 and other modern and well-coated lenses and I like what I see which I could control well with the aperture in real time on the EVF. Absolutely different than what I normally do and I may bring it along with me on the next project to shoot for myself when I have time.
It's nice to shoot with my collection of old LTM and M-series Leica and Canon lenses without having to use a film camera, and several of these lenses add warts, fog, softness, aberrations and other anomalies to the image. I had a little taste with several of these lenses on the M43 but that format only uses the heart of the image circle and one looses the effects of the edges that can both enhance and ruin an image depending upon the subject.
A whole, new box of chocolates is now at hand with little more than a cheap, spacing adaptor!