Yep, I guess it depends on how much data of interest is on the drive. You can hook it up to dmde with a ddrescue/OpenSuperClone-mounted drive, which can let you index the filesystem while it streams content to the backup image. It reads and remembers sectors already copied, and you can target specific files/folders so you don’t have to touch most of the drive.
You should take it to a data recovery specialist if the data is really really important but for lightly-damaged sectors, you want ddrescue (oldie but goodie) or HDDSuperClone (no longer developed) or OpenSuperClone (fork of HDDSuperClone, more actively developed).
You can combine some of these tools with commercial programs like dmde, UFS Explorer, or R-Studio - to target specific files for a quick result - but basically it’s best to get a full disk image off the bad drive onto another drive/image.
No that’s either HDD Regenerator or SpinRite. Clonezilla is a sector-by-sector disk imaging program. (SpinRite et al are good for keeping old drives running for longer but if you want to do data recovery and really value your data, ddrescue or HDDSuperClone is what you want.)
It’s good enough for recent releases (note you may have to open a port for passive XDCC) but because it’s not easy to automate, even public trackers + *arrs (w/ VPN) are just more convenient.
Occasionally you might find releases on IRC and not on public trackers, and visa versa, so it’s good to have a backup. I prefer scene releases so it’s easy to find specific stuff with the xdcc search sites (e.g. dot eu and sun), and maybe a 'lil help from srrdb to verify CRCs.
While you can do command line stuff with CloneZilla, I think what they’re referring to is the TEXT-based guided user interface, which doesn’t seem to differ much at all to the Rescuezilla GUI, which only looks marginally prettier. However, there’s a few other useful tools in there, and a desktop environments, so it’s still a bit nicer to use.