I've said this a bunch over the years -- please see my 2007 treatise, "
The Unified Theory of Gnomes" -- but I've used gnomes and halflings both consistently in my campaigns.
The last 2E campaign I ran was an all-halfling campaign in the Five Shires (incorporating some of the D&D/Diablo material, but otherwise, leaning into the hobbitness of it all, including a murder mystery at a county fair).
When I started my ongoing play-by-post campaign in 2006, which has become the baseline from which other campaigns and live games have branched out of, I made the choice to have the starting barony only have humans, dwarves and gnomes living there. Everyone else existed out somewhere else (this is all set in the world where Ptolus exists, which explicitly has everything in the 3E PHB in it). Possibly to the point of how people will respond if gnomes get more of a spotlight, I had two players (out of nine) playing gnomes, one of them playing a cleric of Garl Glittergold, which led to a
lot of development of his faith, which in turn meant that the church popped up in other ways in that and in related games.
I've also played a gnome illusionist since 2007 or 2008. That game is on hiatus, but we played it as recently as a year ago.
Just anec-data, but a counterweight to "I've never seen a gnome at my table."