Disable Shadows 2D

Unity Engine
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1

Hi, Using Unity 6 (preview):

In short: What’s the recommended way to let players disable 2D shadows (cast by ShadowCaster2Ds), OR increase the performance when using them?
And why can’t I disable/enable 2D shadows from the Universal Render Pipeline, or did I miss something?

In long: I like the 2D Shadows a lot, the improvements to the Shadow Caster 2Ds are really good (e.g. I can now add to Sprite Shape Controllers, and they will be used as the casting source).
I noticed they do take a hit on the performance, for larger maps.
What is the recommended way to let players disable the shadows OR increase the performance when using shadows?

Options available at the moment:

  1. Disabling Shadow Caster 2Ds entirely, see code below. Is that the correct way?
  2. In the Renderer 2D Data I can reduce the “Render Scale” for Light Render Textures to increase the performance when using shadows.
  3. If I select a Sprite Shape Controller I see at the bottom of the inspector, there is a “Shadow” quality dropdown. I can set it to Low, Medium or High Quality, but it only seems to increase the performance by a few FPS. And I can’t them by code(?)
  4. What else is there?

All suggestions appreciated,

    public static void ToggleShadows(bool value)
    {
        var shadows = FindObjectsByType<ShadowCaster2D>(FindObjectsSortMode.None);
        foreach (var shadow in shadows)
            shadow.enabled = value;
    }