There is a very low (approximately 0.08-0.11 RTF) as shown on the curiosity demo in the default world file.

Additionally when limited to CPU, the render shows a lot of aliasing possibly due to the lower resolution/CPU rendering constraints.

CPU is an intel i7 1165g7

This is without any form of rendering hardware acceleration.

Possible solution: bring in correct correct drivers to enable hardware acceleration and increase the RTF to enable a smoother operating simulation environment (for primarily AMD and Intel, nvidia could be covered under a different issue)