Sorry if this sounds like a dumb question but I don't understand the implications - what does " it will be enabled on mainnet with block 293000" really mean since bare multi-sig is still the default method used going forward at least in the near future. Is the protocol capable of automatically switching to pubkeyhash if it fails to create a bare multisig transaction and relay it successfully.
It means the protocol will parse this kind of encoded transactions from block 293000, but it does not mean the client will encode in this way.