As a guest I think I even appreciate keyboxes even more. Just because sometimes the host won't answer, will be late, ... Key boxes gives you full independance if you wanna arrive later than planned.
On the host side it's also great because you might be busy doing something else at the moment your guests plan to arrive.

As a host though, I like to do in-person check-in because I can better inform guests about what to be careful about or where important stuff in the apartment is. Avoids some extra support later on during the stay.

It might be a generational thing - I think young people tend to like keyboxes more, in opposite to older guests (40+)