CUDA 11 Runfile on Ubuntu 20.04

I notice that the runfile install option for CUDA 11.1 isn’t listed under Ubuntu 20.04, only the .deb options.

While the runfile is listed for 18.04 and 16.04 and both reference the same file.

Is this a mistake? What problems am I likely to encounter installing the runfile listed for 18.04 and 16.04 on an Ubuntu 20.04 system?