This forum provides an upload for attachments, why should I e-mail attachments to the forum? And how would the forum know to which thread to add the attachments?
Concerning 10-bit color support: Maybe you should reconsider your roadmap as 10-bit displays in notebooks and modern monitors are becoming pretty usual these days, often even together with HDR. NoMachine should just allow to downsample a 10-bit desktop to 8-bit.