Yes.
It was already used in implementing P2SH. Miners could also indicate support by putting a "flag" in the coinbase field. The block date wasn't set until the new version had 80%+ support from miners. Even then the block date was put months in advance to give everyone a chance to upgrade.
Topic: Question regarding blockchain-splitting features (Read 635 times)
Could features that would split the blockchain (or bugfixes) be implemented in a way that they only take effect at a certain block number? I'm imagining it would be similar to how the block-halving works, but instead of a decrease in bitcoins the effect would be a feature or bugfix being enabled.
I would imagine that this approach could prevent a significant forking of the blockchain, if people were given enough (a lot of) time.
I would imagine that this approach could prevent a significant forking of the blockchain, if people were given enough (a lot of) time.
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