> Technically speaking, implementing DNG would be another development activity on top of a RAW export,

What are you talking about? Canon could implement DNG instead of CR3. It's not that hard. Both of these formats are referred to as "RAW".

Just as I wrote. CR3 is used by Canon also during development and tuning of their sensors and cameras.

DNG would not replace CR3, because CR3 would still be needed before launch, and Canon has no incentive to change their entire internal toolchain to comply to Adobes DNG specification.

Especially not because the DNG format is patented and allows Adobe to revoke the license in case of dispute...