Well, if the compact Z mount lenses were to be f/2 and optically good enough, I'll actually be able to shrug off most of my current (or should I say recurring?) GAS towards the small Sony offers, from the A7C kit to the new primes. Actually, I'd like to add one or two more zooms, too, the Z 24-105mm (that's the lens I've been missing lately for various reasons) and, probably, also the Z 18-140mm DX - if the latter is good enough and sealed, it'd transform the Z 50 into a truely versatile travel and "mobility" camera. I'd quite like that ...Looks like Nikon are doing small 40mm and 28mm F2 lenses for the Z Mount. So for me, a tilt in Nikon's favour against Canon. As is the Fringer Adapter allowing you to use every Canon EF lens on a Nikon Z camera with no change in AF speed or focusing. That can't be done the other way round in Canon's favour. At least currently, but who knows in the future. I must say I'm glad to be sitting on the sidelines seeing how this Canikon battle emerges. I'm terrified that if I make a move now, I'll make the wrong decision and waste lots of money in the process so the wise decision as someone who already has sufficient gear is to wait another year and see how things develop. But I can already see that my fears of modern yet boring computer generated images being generated by these new Canikons are dissappearing as third party lens solutions are really improving, F0.95 lenses are commonplace, I even saw that Meyer Optik Gorlitz lenses in 30mm/35mm/50mm/58mm/75mm/100mm varieties will be or are available right now. Despite all this (and whilst we're talking GAS), I am still checking the eBay prices on a used Fuji S5 Pro, the thought of using my F mount lenses with that CCD sensor is tempting.
As for adapting, apart from the FTZ I really like simply because it works great and isn't too bulky, I haven't found any third party solution that works as advertised yet, neither for Sony nor for Nikon Z. After trying various brands, I'm basically done fiddling around with electronic/AF adapters if they're not native (that's one of the reasons I sometimes feel a faint tug to add a FT1 ...). It just doesn't satisfy - 'nuff said. I'm still enjoying "dumb" adapters, though - shooting manual lenses on mirrorless cameras can be a lot of fun. One of the best things I've found in the last couple of months was a E-to-Z dumb adapter that makes it possible to use my E mount adapters on the Z 6 and Z 50. It's obviously no gold standard (which is the reason why I have a Novoflex NIKZ/LEM as well), but it works and saves me from swapping everything out just yet - something which I may still do eventually once the A7 II is gone.
I also have backed the Lomography Atoll 17mm f/2.8 lens which will come with a Nikon Z helicoid adapter (the lens itself is M mount). From my experience with Lomography's lens offerings, I'm pretty sure both items will be nice enough to work with and reasonably good quality. The helicoid adapter will provide me with an additional way to use my M mount lenses ...