I am blocked from generating a reprex, because every time I try, my RStudio grinds to a halt.
But, in my case (MacOS 10.15.1, RStudio 1.2.5001, R 3.6.0 GUI 1.7)
-preview works for dataframes (20 columns, 1000 rows)
-preview works for nested dataframes, but
if I generate an unnested dataframe, preview grinds RStudio to a halt.
Activity monitor flips between:
rsession
QtWebEngineProcess
RStudio
I can examine the unnested dataframe summary in 'List' view in the 'Global Environment'.
I may be doing something foolish with nest/unnest, still learning the updates on those functions in Tidyverse.