Feel free to change the severity back if you truly think it is that serious.
Some of the autopkgtests may be stumbling about the graphics API change and may need a rebuild of packages interfacing it: svglite, ggplot2, ragg, tikzdevice. As some of these are widely used the rest may be repercussions. There is also the usual mess with the (bulk ?) update of BioConductor which generally releases a few weeks after R and did so again. I maintain that r-base is fine. I have no control over how other people use my package, and if all other maintainers put breaking autopkgtests in well yes then they do hold r-base hostage and it will take "forever" to migrate to testing. We have been there before. Dirk -- dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org