Well, for me it all depends on "how much better" a thing is compared to another one, and relate that to the price
the RF 50 f1.2 is the best (or one of the 2/3 best, as I don't really follow news on other manufacturers) autofocus lens of his specie? Yes, absolutely. But cost around 2500€.
I have the adapted Sigma 50 f1.4 Art, which can be found around 600/700€ new and down to 400€ used, so let's say 500€ on average, a fifth of the RF. Is the Canon better then mine (and of course 1/3rd of a stop brighter, and also doesn't need the adapter)? YES, ABSOLUTELY, and by a large margin.
...but is it 2000€ better then mine? No way, at least personally for what I do (and I dare to say, it's not 5 times better for anyone, not just for me).
I heard good things of the Sigma 40 f1.4 Art, which can be found I think around 1000€ new; the RF is better? Hell yeah! The RF is 1500€ better? Well, again, not for me. And I thought in the past about switching my Sigma 50 with the Sigma 40, which is better (crystal clear by any test out there). But is it two times the price better? Again, not for me.
So, I like and appreciate nice stuff and great lenses
but then comes a moment where you have to balance how much better a thing is compared to what you have, and what would be the cost of the upgrade. Sometimes it's worth the expense, sometimes (most of the times I dare to say) it's not. I'm pretty sure that any photo between the RF 50 1.2 and my Sigma is distinguishable in a blind test only on screen at 100%, or on paper if printed on a billboard and watched from a close distance.
On a magazine cover, after retouch, you wouldn't distinguish the two, and you won't distinguish a plastic EF 50 f1.8 if all three lenses are equally shot at f2; on social media even less. So if I was to shoot billboards and worldwide campaigns I would maybe (not certainly) buy the RF, but as I shoot corporate headshots at f8 in the studio, or I shoot weddings where no couple ever asked me to print bigger then A3, I can say that there's no difference with my Sigma, so there's no reason to put in 5 times the price, at least for a working professional. Of course if someone wants the RF for the pleasure of having it that's absolutely right and sacred, but don't expect so much real life difference as the marketing would suggest.