My view is that the traditionally f/2.8 trinity is moving to f/4+, since we don't need f/2.8 for AF, bright viewfinders, or low noise photos any more.
So this makes having a few fast primes even more useful.
Now, I'm holding out for a 35/1.0, have the 50/1.2, probably would get a 135/1.4 and so on, but I had literally all Canon 50s at the same time and had use for each maybe ten years ago and would totally get a 50/1.4 even having the 50/1.2. 50/1.4 is an "always have the camera in your backpack" lens are are the rest of these, whereas a 50/1.2 etc. really you're just not going to have on you unless you're leaving the house to shoot.
(I had the original 1987 50/1.8 pro-build lens just because it was enough smaller than the 1.4 to have my EOS-1N, 1v, and 1Ds MkI II III in my backpack at all times. obviously I could have carried the 1.4 and had a lighter body but not what I was comfortable with.)