DO NOT USE RUBIK … in case you value customers with old machines.
There are several reports here in the forum with websites somehow not displaying correctly, text not showing up, etc …
https://community.shopify.com/c/Shopify-Discussion/No-text-on-mobile-device/m-p/607487#M147609
https://community.shopify.com/post/889641
https://community.shopify.com/post/1243795
and it all boils down to a problem with the font “Rubik” in general on older machines (Win7, 8.1, maybe older Android WebView components, …)
See the github issue here: https://github.com/google/fonts/issues/1137
State: Currently no solution. No explanation.
So in case you might expect customers with older machines in your shiny new shop, there is only one solution:
DO NOT USE RUBIK