Yeah, like I wrote earlier, my character is at level 50 too. I did use tech to cameras and opening doors whenever available, in addition I also tried using tech shotgun, but I was unable to get any Engineering experience with that, regardless if I used charged shot or not. I used grenades quite often and gained quite a bit of Engineering exp via that, but it wasn't consistent. Most of the times using grenades resulted gaining even few hundreds points of Engineering exp, but then sometimes there wasn't any.I'm level 50 since a good while
I was level 35 when a start "Ghost Town" and "Automatic Love" with "only" NCPD Scanner Hustler and some minor Side Quest (Delamain/Heroe/...)
And I'm level 15 in engeneering and I have some GIGs and a few Side Quests left (mostly those with Padre and Dino).
But I use tech skill on each cameras that I encounter (even in the "wild", like in Pacifica, there are plenty of cameras).
Little important detail, I generally don't use tech weapon or grenade (just a shotgun at the very beginning when stealth is not that great).
While this is important, especially tip about using Tech skill to turrets before ripping them off to Athletics exp, I want to be clear here. While certain things are achievable, that still doesn't mean that everything is working as intended. I doubt most players ever reach or intend to reach level 50 nor looking cameras and turrets and whatever to level up Athletics and Engineering is what most players find fun, interesting and engaging.
I don't doubt your words and I appreciate and I hope other people appreciate your tips too, but considering that we have covered most content that game has but have different results, is actually another inconsistency. My game version was 1.23 and platform is Xbox One X.
That is to say, that I hope CDPR looks Athletics skill progression (topic) and also Engineering skill progression and takes in account that current state of game puts players with character builds with relatively high Body and Tech focus, in difficult position.