I've seen a couple of topics on alchemy and checked all of them, but none really give a "definite" answer to this question:

What is the benefit of having a lvl 30 SUPER Alch?

We all know that WLO is a game that is built around the idea of growth, and with that growth you become stronger. With that said, the same logic should apply to leveling alchemy right? But recently I've been checking out some of the information and its said that it might be a bad idea to have a lvl 30 SUPER Alch. The reason is that instead of a bonus +2 rank jump, you get something like a +4 rank jump all the time and that you would never be able to compound lower rank items or that it would be extremely hard to do so. I mean it would make the +4 compounds WAY easier to get or at least a 99% chance to get it but how can I make the bases? Is this all true? Because I was thinking I might wanna spend the time to do it but I wanna know what I could potentially get before embarking on the path of 8-10 hrs of compounding everyday.