Feature request: use tibbles, not vanilla data frames

[brookslogan]

Copying a short pitch I've made recently:

Context: the tibble format is a popular data frame subclass used in many tidyverse packages like dplyr that tries to clean up some behavior of vanilla data.frames and slightly extend them.

• (Short pitch: it has a nice print method that limits the number of rows printed so you don't get stuck waiting if you accidentally print without using head [and also limits the number of columns it prints data for, simply listing the others by name], changes the behavior of $ and [ to address some issues they can cause when writing functions, disables check.names and stringsAsFactors even pre-R-4.0, doesn't allow assigning row.names, allows some additional column types, etc.; its package also has the convenient tribble constructor.)

I think the print functionality would be pretty nice here.