Considering building this to replace the Toyota front axle in my buggy. The Toyota axle has held up fine and I haven't had any breakage or issues but maintenance and trail repairs (if/when needed) aren't fun.
The JL/JT or JK D44 are much stronger than old school D44's. The JL/JT now have the option of 1410 or even 1480 u-joints, much larger/stronger inner C's, more aftermarket support for upgrades, unit bearings, etc. The JL/JT and JK axles seem to be same strength and weight compared to my Toyota axles. I have zero desire to go with 1-tons, the buggy works amazing as is and I don't want to change that. Plus my wheeling style doesn't require 1-tons.
The JL/JT and JK axles are similar in width to my Trail Gear Tacoma width front housing, so I can run off the shelf RCV inner axle shafts and not have to run a custom length inner.