While a desirable state for users, this could quickly balloon into a nest of support issues for the maintainers due to having many different versions to patch w

While a desirable state for users, this could quickly balloon into a nest of support issues for the maintainers due to having many different versions to patch when a security issue or other significant bug becomes apparent, increasing the project's response time to anything important like that. You could try to mitigate this by maintaining only a couple of versions (perhaps preview, current, and LTS similar to Debian's sid/testing/stable) which would work for small projects, but for large ones or those that see fairly rapid development you runt he risk of stable gaining a reputation for being out of date, unless you bump it forward regularly which puts you back at square one with giving people feature updates they may not need.