I'd suggest turning it on and seeing if you can live with it. Some issues that I've had:
1.) FaceTime calls from people not in your recent calls will be blocked with a silent notification. Sometimes I don't see it for hours
2.) Incoming iMessages will be stripped of Live Photos and document attachments
3.) Using Starbucks in a browser did not work until I disabled Lockdown Mode in Safari for the domain. Fortunately these exceptions are easy to make and persist
I'm not a target for state-sponsored attacks but will generally trade usability for security when reasonable.
1.) FaceTime calls from people not in your recent calls will be blocked with a silent notification. Sometimes I don't see it for hours
2.) Incoming iMessages will be stripped of Live Photos and document attachments
3.) Using Starbucks in a browser did not work until I disabled Lockdown Mode in Safari for the domain. Fortunately these exceptions are easy to make and persist
I'm not a target for state-sponsored attacks but will generally trade usability for security when reasonable.