I've never understood why people like to 'back up' park. It seems like, you're just shifting the work from leaving the space to entering the space. I don't know, I'm usually in a hurry when I arrive and just want to park quickly and am in less of a hurry when I'm leaving. I find it especially annoying when one blocks a long line of cars in a parking garage while trying to turn all the way around to back up. I've never had an issue backing out of a space. It's even easier now with the cameras.
Backing in eliminates a lot of hassle and unlike a lot of people posting, I never thought of it as wasting other peoples time - even in the urban area I am in this isn't even a thing. Probably a 50/50 chance I will when I park although I prefer the pull through spots that allow me to point into the direction I want to go when leaving.
I know cameras and warning sensors make life a lot easier these days but backing into a spot is easy and the variables it eliminates when trying to pull out into a busy lot outweigh the negatives. You don't have to rely on sensors or cameras, you can easily judge the situation by easily looking out.
Backing into a spot takes a little more skill but for the most part you know you are dealing with, 2 other cars already parked and stationary and maybe a 3rd that is the same behind you. When pulling out, you are dealing with the same (up to 3 stationary cars) plus the potential for moving cars.
Pulling out of a spot facing traffic:
1. Scanning left/right with my eyes.
2. Go when clear.
Pulling out of a spot in reverse:
1. Look at the camera or rearview mirror - or both.
2. Confirm by actually turning your head side to side
3. Listening and confirming sensor beeps on display.
4. Potentially have to keep doing the above steps multiple times until clear.
5. Visual confirmation as you pull out.
5. Go when clear.