Let me give you some advice about lockers and their value. It depends on whether you are going to rock crawl and where you live.
I spend a lot of time in Moab. I can assure you there are features that without lockers, you will have a tough time and on some of the slick rock fins/features, you may have a hard time finding a place to winch. It’s not impossible, but you are definitely going to have to reach into your bag of tricks to get through some features.
I also live in the mountains of Colorado. We get some big snow storms and I have a double switchback uphill high pitch driveway that can be a challenge. My main vehicle is a Ford F-350. I can’t tell you how many times that there is snow/ice on my driveway and I’m in 4WD and I get stuck because the differential is hunting for traction on one wheel. I pop my Ford’s lockers on and BOOM I’m on my way.
Are they necessary? No. But they have saved my butt from having to winch myself or go grab a bag of salt or get a shovel to give the slipping wheel some traction.
I will never again purchase a 4WD without at least rear lockers.