The Highest Resolution You Can Watch The Matrix Trilogy On—On A Format Which Refuses To Acknowledge The " fourth " Film—Is HD-DVD
However! you are limited to watching The Animatrix on the Japanese UMD release under the same restrictions.
If you consider UMD "basically DVD" (a format 👎 Resurrections 👎 was released on) the highest resolution you can view it on a format on which the " fourth " film (which we don't acknowledge) was never released is specifically the PAL version of the film on VHS.
If you want to watch The Animatrix digitally and "UMD doesn't count" the Thai or Turkish dub of The Animatrix on VCD is the highest resolution you can own it on (adhering to our silly self-imposed limitations).
UMD is 720×480
PAL VHS is 625x240
I think Thailand & Turkey are both PAL countries, so their VCD is 352×288
I welcome addendums and corrections. I for example have no idea which if any of these films were and were not released on CBHD
What? I’ve owned a Blu-Ray box set of The Matrix for years now. I live in the US.
Ah! but Matrix Resurrection was also released on Blu-ray (and DVD) and the parameters of this thought experiment was "Highest resolution release on a format which never acknowledged the existence of the fourth film."