It doesn’t mean it won’t get maintenance: whether it could get a higher priority or not it is another matter entirely. That said, the obnoxious OpenWRT build system (in another life, I package software for Linux distributions, so I have at least a passing knowledge on the topic) makes adjustments less than ideal even for outside contributors.
This may as it be, just that other packages are maintained notwithstanding and thus that can hardly be an excuse, if it was meant as one, for the package not being maintained.
Not sure whether you are aware/realize that
lxc version in TOS is 1.1.5 (from the LEDE repo) and which was never LTS but ceased to be supported by master upstream in January 2016
lxc version in OWRT mainline/master is currently 2.1 and which was never a LTS either and ceased support by master upstream in September 2018
Someone willing might try to contribute a newer version if need be. It’s just harder for the reasons mentioned. (I’m sure that people from CZ.NIC would welcome such a contribution).
As I’m not experienced with OpenWRT build system please forgive my naivety - but what would be needed to build a 3.03 version of lxc for TO? Taking source and build/package it against current kernel? Or does it need adjustments?
Edit: I’m asking just because I’m looking forward to setting up vms on my TO and this topic touches a nerve - if looking for isolation of software one would want to run the (advertised) vm functionality, but this functionality is outdated