I think people are too quick to dismiss incremental progress; you dropped by 90%, that sounds pretty excellent to me!
You don't have to be a vegan hermit to have an impact. Eating a little less meat, foregoing one flight, and biking to work once a week is better than not doing anything and that's great.
I am vegan. Probably 10-20% of my meals end up being vegetarian (usually with a minor ingredient like trace milk in a sauce).
This is simply out of practicality - we're talking stuff like, going to a restaurant with friends and there are no vegan options.
If everyone did that 80%, the ecosystem would (as it _already has!_) change so much that 100% would be trivial.
I used to think that it's pointless to do anything because no-one will follow you.
That has been empirically proven to be complete bollocks over the past few years. Go all in. I will follow, they will follow. It's time.