I don't own one but my these are what I think. Take it with a grain of salt as I don't own one.
1. I have the Df and I found it's much too big compared to a film camera like the FE or FM even the Nikkormat. The Zf is smaller but is still larger than those film cameras.
2. The Zf is a mirrorless and thus it has EVF. You may like it but it's sure what you see in the viewfinder isn't anywhere near what you would see thru the old SLR's of yours. For better or worse up to you.
3. The controls are there at the same old places except the aperture settings. Even the retro lookin 40mm lens doesn't have the aperture ring either.
4. It has a prominent exposure compensation dial while only the FE has the EC but in a place not meant to be used often. On the Zf it means to be used often as it's located conveniently at the right thumb.
5. It has the MASP-Auto setting which the film SLR's you mentioned didn't have.
6. This I guess nobody cares but as Ken Rockwell also said it's made in Thailand instead of Japan like the FE, FM or even the lowly Nikkormat.

I'm a dedicated Nikon user. I used to have a D600 and now own at D750 and D850. Recently Nikon had a 30 day free trial on the Zfc so I got one to try it out and sent it back. It's an amazing camera but I absolutely do not like holding it in my hand and I don't like the controls. For that reason I'm not interested in the Zf. I've shot the Z9 and the Z7II and to me these feel like Nikons in my hand. I don't know if Nikon is reading this but if you are - I've got money in the bank in hopes that you come out with a Z6III. In my mind it would be the Zf in a more ergonomic body. Please Nikon. I've been waiting almost 2 years for it. Please.

I'm a dedicated Nikon user. I used to have a D600 and now own at D750 and D850. Recently Nikon had a 30 day free trial on the Zfc so I got one to try it out and sent it back. It's an amazing camera but I absolutely do not like holding it in my hand and I don't like the controls. For that reason I'm not interested in the Zf. I've shot the Z9 and the Z7II and to me these feel like Nikons in my hand. I don't know if Nikon is reading this but if you are - I've got money in the bank in hopes that you come out with a Z6III. In my mind it would be the Zf in a more ergonomic body. Please Nikon. I've been waiting almost 2 years for it. Please.

I'm a dedicated Nikon user. I used to have a D600 and now own at D750 and D850. Recently Nikon had a 30 day free trial on the Zfc so I got one to try it out and sent it back. It's an amazing camera but I absolutely do not like holding it in my hand and I don't like the controls. For that reason I'm not interested in the Zf. I've shot the Z9 and the Z7II and to me these feel like Nikons in my hand. I don't know if Nikon is reading this but if you are - I've got money in the bank in hopes that you come out with a Z6III. In my mind it would be the Zf in a more ergonomic body. Please Nikon. I've been waiting almost 2 years for it. Please.

The worst thing is the best feeling pair of underwear I have has SpongeBob on them. So I can’t just drop my drawers and show everyone because I’d be thrown into jail or the looney bin.

And why do we call them a pair of underwear or a pair of jeans when they are a single object? And don’t say because they have two legs because even short-shorts with basically no legs are still called a pair. This is the stuff that keeps me awake at night. Not world peace, climate change, a volcanic eruption in north Missouri or scientists recreating the wooly mammoth and then releasing them into the wild.

The worst thing is the best feeling pair of underwear I have has SpongeBob on them. So I can’t just drop my drawers and show everyone because I’d be thrown into jail or the looney bin.

And why do we call them a pair of underwear or a pair of jeans when they are a single object? And don’t say because they have two legs because even short-shorts with basically no legs are still called a pair. This is the stuff that keeps me awake at night. Not world peace, climate change, a volcanic eruption in north Missouri or scientists recreating the wooly mammoth and then releasing them into the wild.