Benjamin I’m with you on this. I have bought an EOS RP recently and I’m still waiting for a dt release supporting the cr3 files.
For the moment I’m using ART but it’s tough for me to have two different applications to manage my photos. Honestly I wasn’t expecting to use and enjoy the RP so much (my other camera is a Nikon D810) – when I bought it I was perfectly aware that there was still work to be done in terms of dt support but I remember thinking “well it’s just to test this camera and see if it’s worht investing time and energy in this sytem, meanwhile dt will add support for its raw files”… and look where I am now – in the past 3 months the only recent photos I took are all canon’s!
I have looked at the github repos for dt and rawspeed for hints and things to be done but I haven’t seen anything that I can contribute.
If you see this other discussion, I started to look at alternative ways to batch convert cr3 files to a format that can be read in dt but as far as I understand there is no output “raw” format that I can write to using python libraries.
I have recently found out another library that should allow writing to dng but haven’t looked into it very carefully (seems to be targeted to rasbperry pi cameras?):