Vaalingrade
Legend
1) Dragonlance and the anti-science bent D&D went down for a while using gnomes as a catspaw to have wacky scientists who fail at everything vs magic that's clean reliable and better than science. I find both medieval stasis and 'science is exploding yourself' offensive as the end result of fifty thousand years of science.
2) The encouragement of gnomes to be joke characters and just joke characters, enforced by things like the illusionist archetype.
3) Generally the less appealing-looking small race until 5e when things took a turn. Gnomes look like cobbler/cookie/Xmas elves at best, but don't actually use any of that in their lore ever.
4) Speaking of lore: Lack of cohesive raison detre beyond being the joke one way or another. They're fey, now they're trickster small elves, now they're diet dwarves. In the folklore, they're earth spirits, but D&D cares not. Kobolds are also Earth spirits and gnomes seem to also exist to torment them. Oh, and in pathfinder, they are just straight up starfish aliens. Pick a lane!
5) We have halfings at home.
2) The encouragement of gnomes to be joke characters and just joke characters, enforced by things like the illusionist archetype.
3) Generally the less appealing-looking small race until 5e when things took a turn. Gnomes look like cobbler/cookie/Xmas elves at best, but don't actually use any of that in their lore ever.
4) Speaking of lore: Lack of cohesive raison detre beyond being the joke one way or another. They're fey, now they're trickster small elves, now they're diet dwarves. In the folklore, they're earth spirits, but D&D cares not. Kobolds are also Earth spirits and gnomes seem to also exist to torment them. Oh, and in pathfinder, they are just straight up starfish aliens. Pick a lane!
5) We have halfings at home.