Not so much about new features of Vegas Pro 21. Simply, because I am also interested in actual projects, and how Vegas Pro 21 behaves here in terms of stability.
So one acid test with Vegas Pro 21 was to prepare a slideshow. The major first step was a lot of pan/crop and rotation, since I had a lot of scans in the png format - and since the scanner was not able to recognize all pictures from up to 50 years older paper printouts.
The second major source were jpegs. All Material required an adjustment of luminance and colors, using the color grading portal. That worked like a charm, and my calibrated ASUS monitor was used for color adjustment. It worked great. All the work was done in an UHD 25p timeline.
The work was done on my OLED ASUS laptop (see signiture for specs ).
Most impressive for me: I saw near to no crashes (I think one). Stability is improved really, and I think this is important for our work.