Blockchain is a technology that’s been around since 2009,

Actually the concept of blockchain has been around since 1982 but it's true that since 2008 decentralized blockchain has become more popular through satoshi nakamoto.

This only means if you wish to deposit a check at 6 p.m. (or even by 4 p.m) on Friday, you are most likely to wait till Monday morning (hopefully by 9-10 a.m

Yes you have given a practical example and that would clearly help to understand the importance of blockchain in Bussiness .

Good luck