There are a couple of ZBXs and ZBXNEXTs that suggest either adding filter functionality where it does not exist yet or extending the existing ones.
In reference to comments in ZBXNEXT-1861, I wonder if that might be an approach that is technically implementable.

I could imagine that a unified filter/search class, that's easy to integrate in existing and upcoming frontend sections, might be as valuable as timesaving.
In addition to that, it would provide a unified look for filters that might allow to be customized easily.

Feel free to toss this idea if it's too far from reality - in any way