OK, so I repeat, where does he specifically say that you’re not supposed to learn chassidus for more than a half an hour?
You agree, of course, that this sefer was written early in his life before he was mekabel everything from the magid. It’s the Baal HaTanya himself who speaks in almost every maamar in the last 12 years of his life about hisbonenus in elokus. It’s very clear that a person is supposed to spend significant amounts of time on hisbonenus.
Why are you so willing to say that he can change his pesak on things he wrote in the siddur, but something that appears clear in every single maamar transcribed from him at the end of his life can’t mean what it says?
As for modern-day chabad, I have no love for modern-day lubavitch. It’s interesting that you chose אין סוף out of all of the possible terms, since by definition, no created being, human or malach, in any olam, can understand the אין סוף. There are significant problems with modern-day lubavitch, and it certainly has changed greatly.
In all of my comments, I am not talking about the system as it is practiced by modern-day lubavitchers. I am referring to the system as envisioned by the Baal HaTanya himself for someone who has the proper hakdamos in nistar.
And I still hold that the best way to obtain this hakdama is by learning from Reb Aharon Strusele, something that no modern day lubavitcher would do (or anybody from the 2nd rebbe on, for that matter).
And Ii am in agreement with you that the ikar is nigleh, not nistar. It’s just an absolute fact that you cannot possibly hope to make any progress in nistar if you never learn it for more than a half an hour. It requires going slow, thinking about things, learning things over and over to gain new insights, and (especially at the beginning) constantly making sure not to have any hagshama, C”V.
It is impossible to fathom that the Baal HaTanya, once he was megaleh his deep chassidus, would tell his talmidim to limit it to only 30 minutes a day. It all depends on the person and what they need.