I only have seen performance issues for example on an RDS host when application usage restrictions were not set, like remote desktop connections were allowed and someone started to process heavy financials Excel sheets instead of their desktop, and memory consumption when through the roof. In my current setup no remote desktop logins are allowed, AX is only executing as RemoteApp and Excel requests are redirected to the local client. We also have seen performance problems with outdated printer drivers causing the print spooler have high CPU usage.