HAs anyone moved from mirrorless to Nikon FX?

There are so many posts online about people ditching their 'big and bulky' DSLRs for little mirrorless cameras, but not much about people switching back.

I switched many years ago, first to good compacts (Lx4) then to m43 then to Fuji - and now looking at Sony's A7ii or A7rii - basically working my way back up to better equipment (it seems crazy)
The good thing about mirrorless is that I certainly take my camera out more than I would with a DSLR; so I will always keep something like an X100.
However I am getting more and more paid jobs and I am now seriously looking into a D750 to fill the hole I believe is there - some clients want FF (even if they don't see the IQ difference) for my product work now, and for personal it would be nice to have some focus capability of toddlers running around; something the Fuji just cannot do.

Has anyone switched back and can reflect on any differences?