is it ok if we start to see a trend of clients building timelines/feeds from their own databases?

say i want to build a timeline of top/trending posts from a relay or under a topic- it is probably better if a client scraps tons of data from a relay into a db, sorts events in the db to create this timeline and serves it to the user from the db instead of the relay.

this is a direction i see- thoughts #[0]​? this would be pretty harmful for relay diversity tho