would be more useful to have people like you saying "relays should honor delete requests" but i think there's some memes you guys follow about "you can't stop people from spreading it around" lol. it's my fucking relay subscription. whether my relay subscriptions keep my data after i unsubscribe is entirely a business decision. a blanket rule delete over 2 years inactive accounts depends on whether your business policies require scrooging over a miserable few megabytes.
my own collection of events from the last year totals to about 100mb. lol.