I really appreciate the decision NEM Foundation and core devs took for not forking after the Coincheck hack. Hopefully Symbol will still not have this ‘feature’ to turn-off or pause the blockchain for whatever reasons. A non-disruptive feature like transaction ‘flagging’ is in my opinion still acceptable.
SYMBOL from NEM is new blockchain network owned by NEM Holding. Following the launch of the SYMBOL token, the XEM token will remain as a functioning currency on the NIS1 platform, a new chain created for original NEM blockchain. They will still be tradeable on exchanges as normal. So, there are 2 blockchains network by the NEM Foundation.