The reason bitcoin is developing is because to fix the issues we're facing like slow transactions.. Soon this things will be fix and there will be no reason as bitcoin won't be good payment system globally.
the transactions themselves are really fast because it is nearly instant, the confirmations what takes a really long time to happen unfortunately
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The most important thing is the first confirmation. If that happen in the first 4 to 6 blocks, it is fine. If it is too long, it is bad for user.