Melbourne – I’m sure many did; until the last lubavitcher rebbe, no one said that the mitzvah doesn’t apply at all or that only huge tzadikim who can handle the ohr makif bina are obligated to sleep in a sukkah.
This reminds me of an amazing piece in the ohr somayach in hilchos talmud Torah; he says that every mitzvah has a bare minimum that every single jew, regardless of emotional strength (he was very aware of mental health issues, like i said, this piece is amazing) can perform, no matter what circumstances he might be in. In talmud torah, every Jew can say shema in the morning and night, and that is the basic requirement – of course whatever more one can do, he must, and he must always try to strengthen himself to reach new abilities and capacities in learning. Still, I’ve shown this piece to my talmidim over several years and it always hits home – Hashem gave the Torah to every yochid, and knows our struggles and chisronos…he also knows our abilities and gave us a Torah that we all can fulfill.