Both. The RX1Rm2 obviously only has an (beautiful) 35 mm Sonnar and I also use primes on the Z7R3, but when I will be in a situation where I have to rapidly change FL then I use the 24-104 G.
Also, when hiking I mainly use the 24-105 G and take a fast prime like the 28mm F2 or the 55m 1.8 for lowlight situations.
Primes are a lot better nowadays than they used to be and sometimes speed is important or I dont want to change lenses in the open.
'The question is not what you look at, but what you see' - Thoreau
Sony A7R3, RX1Rm2, RX100M6 & a lot of fun