Does anyone actually use A3?

So i decided I'm bored with CFOP and I've been trying some other methods like Petrus, ZZ, roux, corners first, Cardan reduction, but it just feels like it's all for nothing, i cant learn anything too different from CFOP, so I've been stuck to Petrus for a while and just discovered the A3. It's not really a method, but a technique for a more efficient F2L, ZZ and roux block building and is overall seems promising with NMLL, but there's one problem, that being recognition. There are on guides (at least that i know of) for how to recognise A3 NMLL. It's a fairly new method (around 4-5 years old) so it's not as researched as CFOP, but i was wondering if there's like a discord server or a website, from where i could learn more advanced stuff with this method. I currently try to use Petrus, but with more efficient pairs for the right block, what can i do?