There’s no need to use sodium hydroxide. There are many other bases out there that can be made to work for pretty much any plant extraction out there. Sodium hydroxide has been made popular, but it’s just one of many bases that work.
SWIM uses sodium carbonate all the time without any problems. SWIM stopped using sodium hydroxide long ago because its too dangerous, and in some places it is becoming a watched chemical. Sodium hydroxide at pH 13+ is better for STB techs though (which SWIM never does unless he uses the pH 12 calcium hydroxide STB tech, which is a different tech), and it can help break emulsions specific to mimosa (but can cause emulsions with some other plants like Psychotria). SWIM uses sodium carbonate with all standard A/B techs with pretty much every plant, including mimosa and gets good yields with it, even topping some of the reports out there that used sodium hydroxide. It’s all about technique.
When SWIM doesn’t use sodium carbonate he uses calcium hydroxide. Calcium hydroxide is unique and is very useful in some odd extraction techs. For example, the acetone citrate precipitation tech for Yopo/Vilca uses calcium hydroxide, citric acid, water and acetone and can extract nearly pure bufotenine without any emulsions because it’s not an A/B extraction tech.
Also the STB tech for mimosa using calcium hydroxide is pretty good. It’s not quite as good as using sodium hydroxide, but nearly so, and much safer. But the whole tech is different. You use powder bark and mix it with 1 part calcium hydroxide, then add enough water to make it like wet clay. You cover it, let it sit overnight, and then extract the DMT with heptane. It’s easy and works pretty good. But SWIM prefers A/B techs because they nearly always produce cleaner results.