Isn't excess inventory a bad thing? As long as you can meet demand, you want as little as possible.
Absolutely correct. The key is defining what is "excess" and what is "prudent" when it comes to inventory.
Excess inventory by definition is inventory that is not needed for the business to continue smooth operations.
It is inventory that should never have been made, or should have been sold by lowering prices a tad (supply/demand economics).
This is to be contrasted with inventory that really needs to be on hand to ensure everyone is getting product in a timely fashion.
Just in time manufacturing does not resolve the fact your customers are not physically located outside the factory door, and until FTL transporter technology is perfected you still have a fixed shipment time (and associated expense, air shipments are deadly more expensive than cargoship and rail shipments) to build-in to your inventory needs.
In manufacturing, inventory also includes WIP (work in progress). If it takes 5 weeks to produce a wafer from a fab then you have to have at least 5 weeks worth of WIP (inventory) building up in your fabs or you are going to have too little supply of chips come 5 weeks from now.
In general, these kinds of inventory reports have to be taken for what they are worth...why are we being presented with an inventory analysis? Because someone somewhere out there is trying to pay their mortgage by way of getting people to care enough about inventory reports that they will get the advertising revenue they need to pay that mortgage if they can develop a compelling story regarding inventory changes in the industry.
Is there really a story here? Not really, not in my estimation of how much inventory changes over time, intentionally so, in this industry. This is a mountain being made of a molehill because someone needs to pay their mortgage and all they have to write about is a molehill, so they got to jazz it up and get people thinking it is a mountain so the page impressions get to the level they need to be at.