Well sorry but I updated to the NVIDIA-Linux-x86_64-595.71.05 drivers the “hard way”, chose the proprietary version annnnnd I can boot with no added params in my kernel command line. 
I am a member of the vid and render groups like @malcolmlewis and I can post my inxi -GSaz(it’s farther up 
) again but the only thing that has changed is the vid card and driver. Here is my 90-nvidia-conf for modprobe. The uvm entries are just me experimenting but who knows they might be doing something …
dart@windeath:~> cat /etc/modprobe.d/90-nvidia.conf
# Modprobe won't load nvidia_uvm without this !?
# softdep nvidia post: nvidia_uvm
# See 'modinfo nvidia | sort' for list and
# See "cat /proc/driver/nvidia/params" for the actual settings
options nvidia \
NVreg_PreserveVideoMemoryAllocations=1 \
NVreg_EnableStreamMemOPs=1 \
# For Wayland
options nvidia_drm \
modeset=1 \
# Placeholder for nvidia_modeset
# See 'systool -vm nvidia_modeset'
# There are no parameters for nvidia_modeset .. yet
# Placeholder - Unified memory
# use 'systool -vm nvidia_uvm' to see all settings
options nvidia_uvm \
uvm_page_table_location=vid \
uvm_force_prefetch_fault_support=1 \
uvm_fault_force_sysmem=1 \
uvm_exp_gpu_cache_sysmem=1 \
uvm_exp_gpu_cache_peermem=1 \
dart@windeath:~>
Good luck …