There were a number of protests and revolts in Iran in the past 25 years or so, all failed for the most part of their requests.
Women of Iran were crucial for the islamic revolution as well, when all they and their men wanted is to practice islam freely and abolish the imperial hijab ban, among other things (the Shah spending then absurd amount of money on the 2,500-year celebration of the Persian Empire didn't help).
Then the new regime started taking their freedom away chunk by chunk.
While i do applaud them for their courage (of the 1979 generation as well as of this one), which i find to be order of magnitude greater compared to that of women from surrounding countries (especially south, south-west), these protests seem to have started on, to me, confusing pretenses, which is 'Mahsa Amini being beaten to a coma and eventually death by the morality police.'
However, later hospital images, and especially video reports from the police custody,
apparently shows she was indeed NOT beaten, but with a clean face, clothes and a normal walk ,collapsed suddenly.
How she held her face beforhand seems to me like either a "regular" fainting episode or brain aneurism.
Protests were largely peacefull up untill Hadis Najafi was shot dead on the spot, for taking off hijab, tying her dyed blonde hair in a ponytail and shouting at the police, after which hell broke loose.
I think THAT was the breaking point, the regime thinking they can put down these protests as well as they did to all previous ones.
The reciprocal violence plus the energy of the crowds seem largely unmatched to the previous protests, thus i hope and think they might succeed this time.