fabric mods usually takes more time to load depending upon the number of mods we use and lunar uses alots of mods as features as well as optimizations, which is fine in one hand but it it takes a long time to even launch a game...
it will be fine if an option or menu to turn off unused lunar mods(for fabric) which will also give more freedom for user and reduce launch time for the game (experimented couple of mods in my potato laptop with minecraft official launcher and fabric version to get this theory)