Thanks for pointing it out. But said subset of corrections does not introduce the ring artifact in videos, does it? At least I haven't seen it.
I had to look it up, the RP manual says:
Peripheral illumination, distortion, and chromatic aberration can be corrected as you record movies. So the onion rings should show up in movie mode as well.
While we're clarifying things, should the Art line lenses with the newest firmware not add the correction profiles for proper support? I remember an announcement quite a while back saying that they had managed to get correction data working with a firmware upgrade. Guess I misunderstood something there or the OP doesn't have a current firmware on his lens?
From what I have understood, select Sigma lenses have a firmware update available that adds the data for those corrections. My copy of the Sigma EF-M 56mm f/1.2 had it out of the box. My 150mm macro doesn't get firmware updates and the 105mm I rented didn't have one either at that point in time.
Anyway, I wasn't saying that this is not a inconvenience. I just don't take to well to people jumping on to a question thread with a statement that essentially means "Look at me, I am able to always pay significantly more for my products (twice as much in this case) to avoid minor inconveniences". In my eyes, it's just a silly thing to say, as it is the equivalent of answering "You should have bought something better" when somebody asks for help with a problem.
I agree with with the general idea of your statement, but for lenses specifically, I will prefer Canon lenses since DLO is like magic. But for 35mm I'd be getting the RF f/1.8, not the EF f/1.4
Same for the 85mm, I preordered the RF f/2 to replace my EF85mm f/1.8. DLO works wonders on the EF85mm f/1.8. But as you say, the price difference is 2x in this case, which would sway me towards Sigma.
My Sigma 150mm is sharper than my 100mm L and takes the Sigma 1.4x very well. But the IS on it is awful, I hope I can disable it on the lens and still have IBIS