My gear is now split between Nikon's mirrorless Z mount and F mount gear. I need some help reasoning out keeping or selling some beloved gear. Background: My D850 is my first higher end DSLR and I love it. However, I now have the Z8 and over the past 4-5 months, I have grown confident in using it. When I first got the Z8, I would also pack my D850 when I would go out to shoot. It was sort of a back up (mentally in most situations) in case I couldn't manage the new to me mirrorless system and needed to switch over to the D850 to get the shots. There was only one occasion in the beginning when I broke out the D850 but now I leave it at home. Since getting the Z8, I have shot all the major events and outings I typically shoot (theater/plays, birding/wildlife, butterflies/dragonflies/flowers, portraits/family pictures and occasionally some macro). I feel comfortable with the mirrorless system now. A few months ago I did sell some of my F mount lenses and I plan to sell more (14-24mm f2.8, 50mm f1.8,). There are more F mounts I love and want to keep although I'm not sure it makes sense (105mm, 300mm pf, 500mm pf, 70-200mm f2.8- all of which I still use with the Z8). I have the following Z mount lenses already: 40mm f2, 85mm f1.8, 24-120mm f4, and the 600mm f6.3. In the future I'd like to get the Z 20mm f1.8 and possibly the Z 135mm f1.8 plena. However, I'm not buying any more lenses until I definitively decide what to do with the F mount gear. One other piece of info, I don't mind using the FTZ adapter so it is not a factor in my decision.
Does it make any sense to keep the following Nikon F mount gear now that I'm feeling comfortable & confident with the Z8?
1. Nikon D850
2. 300mm pf (use for flowers, butterflies, dragonflies and bugs)
3. 500mm pf (Use for birding and wildlife. I just got the 600mm f6.3 pf and don't know if the 500mm is worth keeping since the difference in focal length is small. I do like that it is f5.6).
4. 70-200mm f2.8 (This is my favorite lens, is tack sharp, and is perfection in my eyes. I use this lens almost exclusively for portraits and theater performances. I hear the Z version is just as good or better. I really don't want to let this go. My fear is I'll never have another lens like this one).
5. 105mm f2.8 (I dabble in macro but often go long periods of time without using this lens. Just don't know if it is worth trading in for the little amount of money I would get for it).
This is not primarily about getting money from selling the gear (although that would be nice). It may seem silly to some but I know my struggle is more with my emotions and attachment to the gear; however, I'm open to reasonings for keeping or selling the D850 and/or any of the lenses. I guess I just need a little bit of help getting over my hesitation and sorting it through without my attachment being a factor. Thanks in advance.