Reduced Elytra Firework

A very creatively named mod, indeed. Reduced fireworks have less power, making them easier to use when flying in enclosed spaces or getting up a ledge when building.

This happens to work as a nerf for elytra, to make traveling long distances with it more resource-intense and less unbalanced when compared to alternatives.

Fireworks used to have a speed cap or "target speed" and would slow you down if you were above that speed. This has been removed because allowing the control of the power and speed is counterintuitive as power directly turns into speed. Instead, fireworks produce decreasing power up to a speed cap, after which they produce no thrust.

Gamerules

Gamerule	Effect	Default	Vanilla-ish
elytra_firework_reduced/firework_power	"Thrust" provided by fireworks	0.15	2
elytra_firework_reduced/firework_speed	Maximum fireworks boost speed, in blocks per second	40	33.5
elytra_firework_reduced/firework_time	Time multiplier for held fireworks	0.5	1

And yes, I know that power is force * velocity so it's technically not accurate.

Mod Presence Enforcement

This mod must be used on the server AND client! If it is installed on the server, all clients must install the mod or they will be kicked! If you join a server without Reduced Elytra Firework, the changes will be disabled and fireworks will work normally! This is to avoid unfairly nerfing yourself, and also to comply with stricter anticheats.

Due to how player movement is processed, the mod must be on the client to actually affect flying mechanics.

To disable this requirement if some players want gentler fireworks and others prefer vanilla, changing "enforce" to "false" in config/elytra_firework_reduced.json on the server will disable the mod requirement checks, but Reduced Elytra Fireworks must still be installed server-side for players to use it.