> Maven land is full of plugins with automated pom.xml version templating that has effectively the same effect as lax versioning, but without any strict adherence to any kind of standard like semver.

Please elaborate on this. I'm a long-time Java developer and have never once seen something akin to what you're describing here. Maven has support for version ranges but in practice it's very rarely used. I can expect a project to build with the exact same dependencies resolved today and in six months or a year from now.

I'm not a Java (nor Kotlin) developer - I've only done a little Java project maintenance & even less Kotlin - I've mainly come at this as a tooling developer for dependency management & vulnerability remediation. But I have seen a LOT of varied maven-managed repos in that line of work (100s) and the approaches are wide - varied.

I know this is possible with custom plugins but I've mainly just seen it using maven wrapper & user properties.