NVMe biggest bonus is in large file transfers etc, so if that's off the table, everything's going to be medium - small, so you'll not see the advantage of it as much.
If the MX 500 lives up to its stated performance as compared to the similar Samsungs then sure it'll be worth the wait, but that's an If. SSDs are fast enough, there's comparatively little difference between the top units or mid range or low end, so it's really a moot point and a brand thing.