TBF, there was an additional reason to use fonts from a cdn in the past: you would benefit from them being already cached (because some other website surely fetched them) and so reduce the latency for the user. Alas, this creates a way to exchange information between different origins _and_ is a permacookie, so all caching, including fonts, is now essentially origin-isolated (I think it's not exactly per origin, but some similar concept; don't quote me on details), so this benefit is no longer there.
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