I generally find that it is easier to handle issues when framed by describing the "issue" (i.e. the thing broken or missing) as the topic - rather than an open-ended question.

Does it perhaps make sense to change topic of this issue to "PureOS is too unstable when tracking Debian testing"?

Whoops, sorry: I totally misread this issue: Clearly not that PureOS is too unstable.

Does it perhaps make sense with topic "PureOS is too stable during Debian freeze"?

How can something be "too stable" or "too unstable"? Isn't it kind of like saying you're too pregnant? Either your pregnant, or you're not.

If foobar v5.0.1 is stable and foobar v6.0beta2 is unstable, then what is foobar v4.2? And what is foobar v6.0+git20190304?

I'd say stability is a sliding scale, so instead of the arguably binary "was the egg fertilized?" more like the more vague "is it an embryo?"

touche’