It's a fair point, certainly interesting, however most or all of it is an assumption (you didn't try the other thing in an elaborate way, let alone double-blind-tested it), plus it might not work like that for everyone.

In the past decades I have written (and still do) like 50/50 in IDEs and plain to somewhat less plain text editors, and if there's something which is a flow breaker for me, then it's coming up with the exact name and method in such plain editor when I just know there's one which does what I need but cannot remember the exact name. Fuzzy matching it against a list doesn't break any flow for me on the other hand.

Which matches how my memory works: I cannot remember hard facts and data well (function DoSomethingVeryHardCore). However I'm good at remembering abstract things (function which does something hardcore). I am pretty sure learning many things by heart from the many very different codebases I work on would be a complete waste of time. Instead learning some abstract mental model of the codebases architecture, and how to navigate through it in text, is what makes me fast and efficient.