https://github.com/ublue-os/countme/blob/main/growth_global.svg
Graphs can be found here on their github. Since around mid November the active user count for Bazzite has gone up by around 16k active users.
Personally, my only wish for Bazzite is a Cosmic version 👼 I tried it out recently and it seems fairly impressive
Agreed, when SteamOS gets more general hardware supporty things will get interesting, but Bazzite is a desktop with superlative Steam support, while SteamOS is more a steam console with desktop support. When people, especially newbs, want to do desktop things with their general purpose machines, on SteamOS they're using Arch (bleeding edge, lower stability), while Bazzites get Fedora (sharp edge, higher stability and security) which should be a less painful and frustrating experience. Of course if there's a flatpak (possibly the third step) it'll be painless on either, and hey, everybody wins (except winblows) in either case.
