Video editing is not as portable as coding, there ain't no git. It doesn't surprise me that they have to do that, I imagine it's simply speedier and comfier to connect to a desktop that already has the work in progress in the latest state instead of ensuring everything is synced on different devices one uses. I also imagine that beefy MBPs with M3 and upwards could handle 4K editing of Severance (or maybe 8K) and they'd edit on local machines, should it be actually more convenient than connecting to a remote desktop. It's a bit shameful to admit, but still something we have to deal with while having such crazy advances in technology.