In our case: 1) slow and long transpilation times, 2) although not that common these days but missing typings used to cause some head scratch 3) overly permissi

In our case: 1) slow and long transpilation times, 2) although not that common these days but missing typings used to cause some head scratch 3) overly permissive/overly restrictive type definitions 4) wrongly configured sourcemaps 5) unreadable type definitions/declarations... The list is long but these are off the top of my head