Drive type for Project Files Drive - Premiere Pro 2019 - Is NVMe worth it?

Hi - I'm building a new machine for my Creative Cloud Suite - upgrading from an i7 machine to i9 9900K. I originally bought an M.2 NVMe drive for the operating system - but reading a few notes on line suggests that I'd be better putting my new Samsung 860 SSD as Windows 10 operating system and using the M.2 drive as the Project Files drive.

Any comments / advice on that please ? - eg how critical is the Project Files drive read/write speeds during processing in Premiere Pro?.

Just for info - I'm adding a 1TB SSD Samsung 860 Media Cache drive for all media I'm working on in the project (live) and sticking to HDD for large Media store offline.

RAM will be 64GB Corsair 3200 DDR4