How does nLockTime work in Bitcoin and what are its practical use cases?

While studying Bitcoin transaction mechanics, I’ve been reading about nLockTime and its ability to delay transaction execution until a certain block height or timestamp.

I have a few questions I’m hoping someone with more protocol experience can help clarify:

Does nLockTime fully guarantee that the transaction will execute after the set block/time, or are there network/mempool conditions that may prevent it?

Can nLockTime be combined with multi-signature wallets or scripts for scheduled payments?

Are there known limitations or risks (e.g., mempool eviction, fee adjustments) when using nLockTime for time-delayed transactions?

I’ve reviewed the Bitcoin developer documentation and understand the basic mechanism, but I’d like to understand more about its real-world usage from people with practical experience.

Thanks in advance for any insights or examples you can share.



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