If you checked all backups you might want to search the disks of the computer(s) you use. Data stored is commonly not really deleted until its overwritten. Maybe some of the lost keys can still be found. Its something I would let an expert do though.
nope, nothing there, i actually do know a bit about data recovery so i have a habit of wiping unused devices clean as i often handle sensitive data
one and only chance is some old backup, but it is quite far away and i'm not to sure if it is from right time...
i will know tomorrow for sure, but my hopes are very low
have you checked /tmp? dont know multihd well but some apps write to tmp before overwriting an old savefile... so maybe you are lucky that your wallet-on-ramdisk has been temporarly saved there
(although systemd tends to wipe this dir regulary and its often on a ramdisk anyway)
well... best wishes...i just hope you have more wallets in safe places.