A hub acts as a multi port repeater. However, as more and more devices connect to it, it would not be able to efficiently manage the volume of traffic that passes through it.

A hub is used in past times where storage space is high and the wires management can be done at a single point of contact.

Switch is portable and effective in terms of speed and efficiency . It provides better way to manage connections in the network.

Hub is used in legacy time when we have connection with messed up wires and low data transfer rate.

Hub makes things at single point of contact if it goes down everything breaks up.

Switch works as sharing the single internet connection to multiple points but with least messed up wires

and also provide better efficiency to transfer rate .

Switch does not make single point of contact so you can not have break down even one thing goes down.

So while using Hub you go to the Bridge way of data flow which is the legacy one .

And while using Switch you go with the Router one which is the new one .