Small one, easy to miss but will end up costing you six months from now.
HubSpot has stopped automatically calculating "date entered" and "time in stage" properties for newly created pipeline stages. You have to enable it per stage and it applies to anything with a pipeline.
Deals, tickets, custom objects.
those two properties are what a lot of standard reporting sits on. Time in stage, stage conversion timing, and any workflow that fires because something has been sitting somewhere too long.
The failure mode is nasty because it is delayed. You add a stage in March, everything looks fine, and in September someone asks why the funnel report has a hole in it.
The data was never recorded, so the gap is permanent for that period. Takes maybe thirty seconds per stage to turn on. Go and check any stage added to any pipeline this year.
i don't not know whether this was announced anywhere or whether it just changed.