(an imperial shitload of gish-gallop, techno-babble, & speculation-as-fact)
That's a lot of fancy talk to distract people from the basic, essential truth that Dash v.14 no longer follows the longest chain and is no longer protected by the proven security model of Nakamoto Consensus.
BitcoinXT had a lot of fancy talk to rationalize its checkpoints, too. How did that work out for them?
Bcash-BAB is also using checkpoints because the real world of thermodynamics and proof-of-work is too mean/hard/scary for them.
How is Dash's version of checkpoints any better than XT or Bcash's?
Masternodes don't make Chainlocks better, they just massively expand the chainlocked network's attack surface by opening up new vectors (hello partitioning attacks ) for malicious and/or incompetent Masternode operators to abuse their trusted third party privileges.