Agree with everything, although I would say at least in Soto 45 mins seems to be the maximum for one period during sessin, and 15 of that will be kinhin (walking meditation), I tend to do about an hour a day in two sessions, but any longer and there isn’t really any reward.
Drugs are a hard no, I mean do them all you want but don’t combine the two.
Of course, different traditions will have different meditation techniques of varying lengths. There are many, and best to follow one path where people don't experiment too much on you and themselves. That the same techniques have been practiced for a looong time (think: like a vaccine!).
As a "beginner" meditator, 20 mins a day is plenty though. As an "experienced" meditator 20 mins is enough too (you may in time meditate anytime/anywhere).
It's when people take on themselves to "do much more", mix several spiritual practices or follow cults that do extreme regimes that things might sometimes get crazy. Most people do OK, but there are people who need medication or have deep-rooted issues that maybe should not be doing meditation, at least not until those issues have been settled.
Another issue is that some deeper practices were basically developed for monks, to be learned after years of initiation and acceptance.
The point is to stabilize and calm the body-mind-spirit complex, a harmony which is called yoga.
Taking drugs, even alchohol, stresses the body and mind, and may distort and cloud the spirit. This work against yoga / equanimity / clarity.
There are traditions that uses drugs ritually, so is part of those traditions. Though, it is often a more perilous and dedicated path. Not everyone needs to live life as a sage or munk.
So doing sadhana (practices) will work over time. It's not a competition.
Because they destabilise the mind, which is particularly dangerous when pursuing powerful spiritual practices where balance and stability of body, mind, emotions and energy are basic requirements.
An imperfect analogy is taking drugs and then driving fast on a windy mountain road.
Agree with everything, although I would say at least in Soto 45 mins seems to be the maximum for one period during sessin, and 15 of that will be kinhin (walking meditation), I tend to do about an hour a day in two sessions, but any longer and there isn’t really any reward.
Drugs are a hard no, I mean do them all you want but don’t combine the two.