I disagree. From experience, 1-2 sec added response time at "end move" (res. dep.) is better than noise, or switching&running final simply to see, if stuff is "good enough".
Also, for an artist is better to have any option than none at all. How about AMD GPU users? Or do you plan to integrate its RadeonPro ML denoiser? ;)
Personally, I feel opposite and prefer using OIDN over OptiX in viewport & final... it just seems more natural and helps me lessen OCD impact. :)
Attached is demo using Blender w/ LuxCore, switching between both denoisers rendering in viewport.
PS.
OIDN is also getting GPU feature support.