Why people afraid so much about the confirmation's duration?

[Greatchu]

When someone sends X BTC to an address the transaction becomes unconfirmed and gets spread over the world. No one can stop that.

I've just seen many people here discussing that bitcoin is not instant payment for shops. Since no one can stop the transaction and the satoshi per byte has a limit on how low you can set it, why people afraid that miners won't mine their transactions? Memory pool keeps them for 2 whole weeks.

Miners will always mine your transactions and it depends on how faster you want your transaction to go through, using low Satoshi will make you wait for hours or even days before your transactions get approved in the block

[bob123]

Miners will always mine your transactions

Not true.
Transactions can be for example replaced if the RBF flag is set, resulting in the initial transaction being dropped from the mempool. This TX will never be included in a block since it would invalidate the whole block.

using low Satoshi will make you wait for hours or even days before your transactions get approved in the block

Satoshi is the pseudonym of the creator of BTC.
Even a low fee rate (sat/B) does not directly mean that you will need to wait for a long period of time.

This always depends on how many transactions are in the mempool waiting to get confirmed.

Roughly 5 hours ago the mempool cleared completely:



A transaction with 1 sat/B would have been included in the next block if it has been broadcastet at that time.