flatpack, snap and all thpse docker wanabee solve the right problem the wrong way.
(pseudo)static is a quick & dirty solution to a real problem. really solving it requires skills and time. which are all quite scarse given the new generation appetite for ease of use over efficiency
It looks bad: Security hole in popular library (crate) and you need to update everything (and, probably, wait till authors of software update their dependencies) instead of update one system library.