But saying No too much might result in features sorely missing from your Project. For example, Mastodon quote tweets, or viewing accounts follows and followers.
"Sorely missing" really depends.. for you, a particular user, maybe. But e.g. not having quote tweets in Mastodon was a very deliberate decision (I don't have the issue at hand) not to go in the direction of Twitter here. Quote tweets have their downsides too. This was about keeping project direction and doing things the Mastodon way.
But backfilling old content, full followers and follows? These are indeed sorely missing.
Let alone the horrible Mastodon search.