Since my mavic is only about a week old I am still in that Can I trust you stage with it, even when I bought my non DJI quads last year (mjx Bugs 3 & b2w) I had trust issues for a few weeks, and they only cost 300 each. You have to build that trust.
I have been sensible and not with my mavic. I fly out in the open, and around my neighbourhood, I pushed it as far as I pushed my non dji drones right away, if I knew I was safe there then I knew I would be able to push further.
My max distance with the bugs 2 was 456 feet altitude, and 1650 feet out, and at that point the drone complained more than I did from LOS. and it always came back,
I've done that with the mavic and gotten so much more from it, as the video is rock solid so I am confident with regular flight distances within the rules.
I've started to push it recently, I set my agl limit to 200m and I've gone out to 500m no issues. I don't see a point to going to 500m altitude, but I know I will get curious at one point. It's the nature of the beast.
I want to be able to take her out to 4km (the limit in CE mode) but I do NOT in any way have enough confidence in that right now. Thats all day by day learning. I want to know the ins and outs of everything before I seriously test the range.
Its all a day by day, I read all the incidents here, in each I also see the solution and the cause, and that improves my risk assessment and what would I do in this situation scenario. When I think I have it all backwards and forwards for situations and how to fully run every little bit of my drone, I will be ready to push the limits.