I can vouch for WAU. Been using it for over a year now on 8k+ PC's for around 100 different apps. Using app whitelist via gpo/intune to ensure only apps we have tested are included in updates. You may find challenges with some apps that have custom things like network license servers (JetBrains) not correctly working with this automation. Some apps are tricky as they aren't capable at system level since they install into %appdata%, so we install those at the user level deployment in sccm.
One issue I see is that if you are on win11, these updates don't start processing until at least one user has logged into the system. This is a Windows issue, not WAU. These deployments start installing as soon as they login and the wait times are pretty short.
Careful, he's watching...