Okay, this is ridiculous: even before I select anything (before the update actually starts, that is) the GPU usage of FS 2020 goes up to near 100%.
What is FS 2020 doing here? Mining bitcoins while we download the update? 
Here are some specs:
- Windows 10 2004
- iMac 27" 2017, i7, 32 GB RAM (before you ask: Windows 10 is running from an external SSD)
- AMD Radeon Pro 580 GPU, 8 GB VRAM