What Herr Rönnquist said.
And given that I actually *do* set type with some regularity, I can say
from experience that, with the exception of some monospaced examples
that are only *nominally* sans-serif (e.g., Bitstream Swiss Monospaced),
sans-serif fonts in which uppercase I and lowercase l are readily
distinguishable are about as scarce as the proverbial hen's teeth,
whether you're talking digital, photo, hot metal, foundry, or wood.
--
James H. H. Lampert
(And for the record, my "go-to fonts" are all versions of Garamond.)