Better and Faster than OptiFine
Reputation ranks
Ranks only ever go up; points can drop but your rank stays.
About reputation ranksI've been following Fabulously Optimized and OptiFine parity endeavors for Fabric for a very long time. Not only does the game load insanely fast but it also uses far less of my GPU and RAM, both of which are bottlenecks on my office-oriented laptop.
In terms of OptiFine parity, Fabric can now do pretty much everything and more, and Fabulously Optimized wraps it up into a nice, neat bow with all the mods included. Resource packs that use custom models or CIT that were/are designed for OptiFine have drag-n-drop compatibility; it's as simple as that.
FabOpt is faster than OptiFine. FabOpt can do everything OptiFine can do (and more). And, importantly, it keeps up with the latest game version so you'll always be able to play!