We have some features which lists all classes (e.g. descendants of a class) during boot. This creates situations when Foreman does not behave the same as in production and it can lead to confusion for users who don’t know about this problem. For example, when working on Subscription API (Foreman events and webhooks), you actually need to turn on eager_load to be able to do anything reasonable.

Discussion: https://community.theforeman.org/t/rfc-turn-eager-load-on-for-development/22125