My system is back up, now with Ubuntu 20.10 (Groovy). However, I have an issue with boost. 1.67 was replaced by 1.71 and it's complaining:
CMake Error at /usr/lib/x86_64-linux-gnu/cmake/Boost-1.71.0/BoostConfig.cmake:117 (find_package): Found package configuration file: /usr/lib/x86_64-linux-gnu/cmake/boost_python-1.71.0/boost_python-config.cmake
Still working on figuring it out. I'm not the only one but there doesn't seem to be a solution. I'd rather not reinstall 20.04 just to solve this, so we'll see.
bootstrapscript for Ubuntu 20.04 to use the newer version of Boost again. Then we just won't worry about py2 after that.