With a modest amount of coding one could make it so that nodes would just download a UTXO set committed to by miners... it would almost just be a weekend project coding wise... of course, this would just blindly trust them for the integrity of the history but that's what those other blockchains do.  The distinction between them and bitcoin is that for Bitcoin the security and decentralization means something, for many other projects it's just a costume to hide asset issuance from regulatory authority.  BSV obviously doesn't care but it doesn't seem like it has any substantial technical contributors or at least not any that aren't just undermining it through malicious compliance.