I imagine UH-60 and variants will continue to serve (who knows, maybe with new airframes) along side the MV-75 for quite a while, in a similar way to how UH-1s continued to be in use well after UH-60s were deployed in large numbers. This Congressional Research Service summary of the FLRAA/MV-75 program states that the Army has plans to continue ordering UH-60s (on the order of 255 between 2027 and 2031) - https://www.congress.gov/crs-product/IF12771

The key requirements that drive MV-75's downsides (size, complexity, cost) is the Army wants to play game in the Pacific. The UH-60 is deeply limited there.

For example, the MV-75's range should let it go (one-way) from Guam to the Philippines, straight from Okinawa to Taiwan (no need to island hop) - potentially as a two way mission. Same as Philippines to Taiwan.

The "comparability" is that the MV-75 and UH-60 can be delivery ~14 troops into an order magnitude similar size clearing.

What is so unbelievable about that?

Sure, its going to take decades to actually make the transition and the UH-60 will remain in service for decades more after that in less demanding roles. I expect by the time this finishes, the MV-75 will be considered another workhorse, if maybe slightly fuzzier and the UH will be an antiquated platform.

But ultimately they both solve the same problem, moving stuff from A to B in rough terrain fast. But with the ever increasing amount of reconnaissance assets, A needs to be further behind the frontline and so range and speed needs to increase beyond what you can manage with a pure helicopter.