TBana stops have sheltered bike parking. The surprisingly sensible & good bit: they have powered tyre pumps.
In rush hour at TCentral (Stockholm’s rail/TBana hub), subway trains are so close running that following trains are a metre or less from the one before. It’s almost a continuous single train.
The concrete of the TBana tunnels between TCentral & Östermalmtorg have taken the form of the shuttering used in construction that they appear to be lined with grey planks.