Hello @simplytadpole ,
While GRUB may look better, and I enjoy tweaking my boot menu too, I like systemd-boot on an efi system much better since it removes the use of the GRUB filesystem(s) at boot up, using instead the info of storage gotten from the BIOS. Plus systemd-boot makes it another part of the system process, thus a system target, so a rescue mode should be easier for instance and less cryptic than dracut perhaps.
The issue you are mentioning around
/etc/modprobe.d/amdgpu.confis reportedly solved for kernel 5.16 which is currently in test week https://fedoramagazine.org/contribute-at-the-fedora-linux-36-test-week-for-kernel-5-16/.
Boot up and shutdown time can vary, you’re not the first to note this with recent Fedora releases. From a personal note on my AMD based system, I find the default of some packages are more beneficial to Intel CPU’s, such as power-profiles-daemon. I have to uninstall it and install tuned which better configures my CPU for my workload ootb. But I haven’t really dug deeply into fine tuning this setup yet.
It uses zram based swap by default so yes it will appear to use more than others are on traditional disk based swap. But I agree it has become somewhat more resource hungry of late.
Fedora Linux will always keep a backup of at least one kernel, but usually three in total are available, current, last and rescue. This is configurable.
This is a big one worth a topic of it’s own, but I would start with https://fedoramagazine.org/?s=btrfs which is all the Fedora Magazine articles about btrfs with some valuable links. The subject matter covers your questions I think. In short by default Fedora Linux will make two subvolumes for a btrfs install, one mounted at
/ and one at
/var, which includes
/home. My habit has been to make
/home as separate subvolumes for more snapshot flexibility. It is default CoW plus compression and uses reflink for cp.
Not true, as noted elsewhere here, you do upgrades from one to the next as it get’s released, plus there are updates in between releases. The time it takes is usually not that bad in my experience.
dnf info --installed maybe.
There is a renewed/greater focus on Gaming, to answer somewhat your questions around it. I think the sig is getting revived and that would be a good group to get those answers from since it will be foremost on their minds likely. Again there may be some answers in recent Magazine articles https://fedoramagazine.org/?s=gaming
“Fear is the great mind killer” according to Muad’dIb. Bring on the ‘Wall o text’, though in truth, these questions are much more appropriate for discussion.fedoraproject.org since they are very likely already answered there.
Happy Linux life!