This is the biggest thing for us: there is no clear pattern. We have an entirely in-house theme, and if there is something we’re missing or need to change, we’d be happy to build it / fix it. The wall of silence from Shopify makes it challenging to to say the least.
We’re using TripleWhale for external tracking which gives us a reasonable picture (it does not rely on cookies, relying on behavioural tracking instead), however this doesn’t help us with stats we were relying on from Shopify itself. We’re also likely to build an in-house cookie banner based around the API Shopify provides for greater flexibility.