Hats off to the 3dsmax team, the features in the 2021 release are really helpful - I'm huge fan of the display / OSL HDRI improvements.
Few thoughts -
I noticed that if you have an HDRI map plugged into the texture slot on an Arnold Skylight, the resource collector doesn't catch it.
Semi-related - I'd really love a native Arnold file format that collected everything Arnold related (Objects, Arnold properties with height maps, cameras , lights, animation, etc.) and was able to seamlessly transfer between other DCC packages that also have Arnold installed on them. Currently, the combo of FBX /.ASS files still require additional steps to hook everything up when moving files between Max - > Maya/C4D. An Arnold option to export to those specific DCC's would be great if there are differences in how those would need to be formatted. (If there's another universal file format that's going to incorporate all this, let us know).