Welcome @jayda,
They can be used alongside ACF and in some cases they can be used as an alternative.
As the number of property types grows, I’m sure we will see more and more people using Components for many different scenarios and in ever increasingly creative ways.
While you can certainly do a lot with the input block, full form functionality is a planned feature:
It is absolutely possible to create websites like these. Cwicly is ideal for building your own custom themes from the ground up and gives you a vast amount of creative control over the layout and styling.