Needing to do geometric sequences as syntax like that is clearly a parlor trick, a marginal use case. What goes through a good programmer's mind, with experience of getting burned by such things over the years, is "If Raku implements this parlor trick, what other ones does it implement? What other numbers will do something I didn't expect when I put them in? What other patterns will it implement?"

Yes, you can read the docs, and learn, but we also know this interacts with all sorts of things. I'm not telling you why you should be horrified, I'm explaining why on first glance this is something that looks actually quite unappealing and scary to a certain set of programmers.

It actually isn't my opinion either. My opinion isn't so much that this is scary on its own terms, but just demonstrates it is not a language inline with any of my philosophies.