Yes. The intelligent multi-device-type feature is a huge improvement for any workload that needs more space than what an SSD can affordably provide, even moreso with the reliability of eg RAID1.
Before that I had to use BTRFS (RAID1) on bcache (not fs) devices, but half of the cache space was being wasted on the redundant copies because the two systems operate independently.
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I had bcache + btrfs (RAID1) before this but it was a huge waste of space because bcache had to cache two identical copies of the data in order to be effective (since BTRFS and bcache don’t communicate and BTRFS picks from a random disk); that’s half as much cache.
With Bcachefs everything is integrated so it knows to cache only one copy in RAID1 (and it doesn’t even need to hold two HDD copies, the fast/“cached” copy counts). Data is read from the fastest source and every resource is best utilized.
Yes, lots of storage space with redundancy and the speed advantage of an SSD. If you have enough data where a pair of reasonably priced SSDs is not enough then it is highly advantageous to combine them with (cheaper/bigger) HDDs.
Personally I would not consider a filesystem without data redundancy for my personal files, and I have enough pictures to fill some hard drives but I don’t like waiting for them to load.
It has RAID modes and it intelligently rearranges data s.t. commonly used files are stored in a fast drive and fetched from there, whereas BTRFS will write to and read from a “random” drive regardless of its speed.
The previous solution of using btrfs raid1 + bcache (not the FS) separately was very wasteful because the cache had to store both/all copies of the data since btrfs picks a random drive to read from.
All the advantages of btrfs + the ability to combine SSDs and HDDs in a way that maximizes speed and space.
I am very happy with my ASUS ROG Zephyrus G14 GA402RJ. It’s small, powerful, not too expensive, has a recent AMD GPU (RX6800S) / CPU (Ryzen 9 6900), upgradeable RAM, good resolution, and a gorgeous screen (great for photo development too).
I use Zim, a local wiki which uses text files with a markdown-like syntax, Syncthing to synchronize the notes, and Markor on Android supports this syntax.
What’s wrong with XMPP? I’ve been using it for many years, it’s by far been the greatest experience and it has OMEMO encryption.