This issue has been brought up on this forum before: major Linux distributions are dropping Python 2 support and thus no longer support displaycal. And it’s understandable that it will take some time to port displaycal to Python 3.
What I wonder is: How complicated would it be to create an AppImage with displaycal, Python 2 and the necessary Python 2 libraries (such as wxgtk) that could work on any distribution thanks to the self-contained nature of AppImages? This would at least be a feasible workaround for the current compatibility issues.
Another alternative could be a Linux USB stick/CD-ROM boot image with displaycal (for example, based on Debian 10). Does anyone one whether such a bootable distribution with displaycal included does already exist?