Interesting. I must admit I've never used substitute. I tried dims but: Error in dims(iris) : could not find function "dims" I do find the occasional oddity.

Interesting. I must admit I've never used substitute. I tried dims but: Error in dims(iris) : could not find function "dims" I do find the occasional oddity. I've noticed more very useful messages/warnings (particularly in common tidyverse functions) recently, so I think they help. To be fair, these quirks are generally very uncommon in day to day use.