There are so many great ways to ensure people are (or are not) notified in Project Online. For example there is the standard e-mail notifications option, but even if this is turned off, you can create a PowerAutomate/Flow to send customised e-mails based on certain events, resources, resource roles, etc. You can also use the task alerts feature and create specific filtered views in the Project Site that automate notifications. For example you may want to send an alert to a group of Execs (that don't have to be on the project team, or even have a PWA licence) about any milestones that may "slip" in your project(s). I have found this is a fantastic (but under-utilised, and little known) feature for automating alerts and without bombarding people with unnecessary e-mails. BTW the notifications can send SMS as well as e-mail alerts (if SMS is enabled). This is the level of sophistication that many of our customers running complex and large projects demand. I hope and wait patiently for a similar level of sophistication in Project for the Web... but I agree a blanket option is rarely welcome - in most cases users will simply set up a rule in Outlook to "dump" these unwanted messages or mark as junk - defeating the very purpose of the notifications. 🙂