Do you know if that that makes any difference?
As a EU resident myself I completely understand, it just is a bit tough to make the changes as a small company, but if it’s legally required we’ll make them ASAP.
To ensure you don't have problem down the line, make sure they themselves store their data in the EU (for exemple, french OVH allows you to chose where you data is stored, their french datacenters are fine, but I would not go with their canadian datacenters).
Allow me to remind you that it's not just the hosting but anything that touches that data, eg analytics and error reporting services are concerned too
I was just thinking about the other services, for example would Cloudflare be ok? We proxy all our traffic through them, and they are key for DDOS prevention, I suppose data goes encrypted to them.
Anyway sadly no Cloudflare isn't ok, it's specifically one of the three provider that got Shopify convicted in the parent article (other two being Cloudfront and Fastly).