Okay, so here's the predicament. I'm looking to buy some camera equipment and i'm slowly loosing the will to live with decisions. My current equipment. Camera - Canon 6D Mk1 Lenses - Canon 100mm Macro F2.8 L, Canon 24 - 105mm F4 IS L, Canon 50mm F1.8 Do I: A - Expand on lens quality and choice - Canon 24-70 F2.8 L? Canon 70 - 200 F2.8 L? Canon 16 - 35mm F4 B - Update camera body - Canon 6D mk2, Canon EOS R or similar? Primary uses, Landscape photography and portraiture. Secondary - Wildlife photography although this is rare and I coped okay with my 6D. Decisions.
IMO 6D mk1 is still excellent for landscape and portrait ... for wildlife, an advanced focus system of mk2 surely will help you
I don't know the 6d & 6d Mk2, but good glass in terms of quality and range of focal lengths is always money well spent. Back in the film days when I was in the trade, that was an easy call, the cameras above your build quality threshold were (more or less ) a light tight box, and the lenses would make or break the image quality. Not so easy to say that these days...
I have to admit i have been giving this a little more thought and I am currently edging towards new glass and other equipment to make my life a little easier. While having a higher-spec body would be nice, the glass would be more suitable and will keep it's value longer.