On the other hand, isn't the FreeBSD user base shrinking and its former users going to Linux?
*BSD is dying! You don’t have to be Kreshkin…
But seriously, if one counts macOS and iOS as FreeBSD users, there are more than ever. Of course that means counting Android and Steam as Linux OSes, in which case Linux users still greatly outnumber FreeBSD users.
No. As enshittification encroaches onto Linux the user base is moving the other way. To their benefit, I might add. With ZFS on root in FreeBSD it's a no-brainer.
Linux is feeling more and more like a bunch of random tools thrown together as opposed to a complete OS designed to work as a whole.
As a 25 year Linux user (for work and at home), I've been experimenting with FreeBSD in the last year or so and I've found its simplicity refreshing. Maybe I'm swimming against the current, but I'm sure there are dozens of us!