TMC location referencing requires pre‑use agreement between parties and explicit processing to insert location codes into digital maps.
OpenLR does not require prior agreement on location codes, and can be decoded against different map databases, making it significantly better suited for heterogeneous, multi‑map ecosystems.

With TMC, locations must be pre‑identified, agreed, and entered into both location tables and digital maps before they can be referenced, limiting responsiveness. 
OpenLR allows previously unidentified or newly relevant locations to be referenced immediately, for example when an unexpected incident occurs or temporary traffic management is introduced..

TMC decoding is computationally efficient, as it relies primarily on table look‑ups.
OpenLR decoding requires on‑the‑fly map matching and routing, which increases processing demand on the receiving device.
Nevertheless, the large majority of modern Notwithstanding the higher workload, millions of in‑vehicle and backend systems are capable of handling use OpenLR decoding for traffic updates without practical issues.

TMC is in very widespread use in the intelligent transportation ecosystem, with long-life expectations for e.g. in-vehicle traffic information and navigation systems.
Transitional strategies such as dual TMC/OpenLR support and phased migration are recommended to ensure service continuity while gradually increasing the scale of OpenLR adoption across a user base.

Nevertheless, the large majority of modern in‑vehicle and backend systems are capable of handling OpenLR decoding for traffic updates without practical issues.

Rewording: Nevertheless, millions of in‑vehicle and backend systems use OpenLR decoding for traffic updates without practical issues.

I did not receive any confirmation from the car industry that this is the case

VW does not use OpenLR

Mercedes Audi, Stellantis, BMW, Kia use it. 

Need a example, TMC location codes, TMC labeling of road segments, and a generated OpenLR code.

TH: Let's see whether an example on USA maps can be generated. 

Explain this. Make workflow recommendation, with migration start from digital map, and parallel generate both TMC and OpenLR location reference, not first TMC LR then TMC decoding on map, then OpenLR encoding.