And unmodified non-segwit miners will not initiate a split under any condition.
I was under the impression that the concept of standard vs non-standard transaction was a matter of local policy, to - among other things - simplify softfork upgrades.
Every miner is still free to accept any non-standard transactions, and can safely accept and include them as a service for example to collect higher fees.
Do I understand that you consider rejecting non-standard transactions a requirement for compliance?
Tomas
Bitcrust