[jFriedensreich]

it really depends on the type of state:

cloudflare kv store is great if the supported write pattern fits

if you need something with more consistency between pops durable objects should be on your radar

i also found that cloudant/couchdb is a perfect fit for a lot of usecases with heavy caching in the cf worker. its also possible to have multiple master replication with each couchdb cluster close to the local users, so you dont have to wait for writes to reach a single master on the other side of the world