Yes, you can still do that. The only differences with modern Kobo devices are the loss of an external uSD slot and, on the latest modeks, the liss of the intern

Yes, you can still do that. The only differences with modern Kobo devices are the loss of an external uSD slot and, on the latest modeks, the liss of the internal uSD slot. I also have a hard time describing the process as jail breaking. Updates to the Kobo are simply unprotected zip files which contain firmware updates along with a gzipped tarball that contain updated files for the filesystem. Anyone with a knowledge of Linux can modify the software. Ibalso consider the situation as rather stable. Not only has Kobo/Rakuten been ignoring modifications of the open source components for over a decade, they have been ignoring patches to the proprietary binaries.