Unaccurate: fuse2 being maintained depends on the GNU/Linux distro. I personally use and love Void GNU/Linux (because it is [censored] systemd-free) which continues support for fuse2, so in that aspect it can be private and/or secure on GNU/Linux which was the only point from you I was challenging.
Again:
helium.computer, official homepage of the helium browser:
Helium updates itself automatically on macOS, with auto-updating options available on Linux and Windows.
Also you can use a script for auto-updating which again means that it can be private and/or secure on GNU/Linux in that aspect which was the only point from you I was challenging.