Yes, generally speaking, the general preference for enthusiasts in keyboards is for a smaller form factor. Many reasons, really, but space-saving and functional efficiency are the main ones.
Not everybody has a humongous desk, and as the nature of their work changes over time, people end up realizing they don't require the numpad, F-row, etc... PCBs for custom keyboards are also fully programmable so these keys can also be accessed with function layers and keybinds that are optimized for each person who uses them. All in all, it just makes for many more reasons for why full-size isn't as advocated.
That said, there are occasional times that 1800/full-size-like layout boards do come out (e.g. TX1800, Austin, Duck Jetfire, Duck Blackbird, cypher, Rekt1800, Sar, Odin, etcetera), but indeed they are less common compared to the layouts with higher demand (normally anything between 60% and TKL is preferred by most).