I was checking out the wiki and was mildly entertained by the private manufacturer arms race that's going on with GEN2 MJOLNIR variants.
Look at Chalybs Defense Solutions (CDS). They had numerous facilities on Meridian that they used to manufacture the old Scorpion variants, the Mark V Operator variant and the Mark V Commando variant. Then Meridian got glassed in 2551 on the tail end of the war and presumably that lead CDS to liquidate their assets due to how much infrastructure they lost. So they sell off the rights to the Scorpion to Acheron Security and Operator and Commando to Naphtali Contractor Corporation.
NCC heavily revamps the Operator and Commando armor, more than likely just putting the name on to a product they already had developed for brand recognition purposes. Then, after getting some of their capital back after losing their production capability, they start manufacturing again with a new line of MJOLNIR for the GEN 2 platform extremely reminiscent of their Mark V Commando variant, probably again for brand recognition purposes.
I mean, if the player base is a representation of the SIVs (given that we're playing in the simulation mode and are technically canon), that would mean there's a contingent of troops that are enamored with the older armor styles, most notably Mark IV, V and VI MJOLNIR.
