Its a little sad to see you guys argue like that, I'd expect that on dpreview forums but not here.
There is no absolute when it comes to lenses imo. We all have different goals and preferences.
I personally hate zooms, my brain just works better with primes. I'm all about that fixed focal length.
That said, I'm not shooting sports/action like gt3rs, where I gather getting the shot is the only thing that counts.
And that ties into his perspective of optically better is superior. I get that and his observations are interesting.
Again personally, none of that matters. In fact the more CA, vignetting, even softness can equate to lens character. There are also other factors like micro-contrast and 3D pop that I find are often better on primes.
Not to the extreme or for every situation though, let's not get silly but case in point being the infamous EF 50mm F1.2.
I have to chuckle when gt3rs says its "useless for photo". A good friend of mine uses that lens exclusively for photography and has his work exposed in numerous exhibits.. I'm also a big fan of that lens both for photo & video (we nickname it the Hattori Hanzō).
I understand his perspective though, it's no secret the lens is soft wide open and has a bunch of CA. again, for sports/action its probably a terrible lens choice. But for artistic purposes, that dreamy look is key. Same goes I'm sure for Canon's FD "dream" lenses and all kinds of cult vintage lenses.
So there you have it really.. zoom vs primes, modern vs vintage lens designs. There is no right/wrong choice, just whatever suits you best. No need to insult one another over their personal preferences.
Getting back to the original discussion, thinking about it some more, Canon shutting down third lens manufacturers is going to hurt the system. I guess that means no more Sirui RF too, so no more native anamorphics etc. Bad move for us customers..