Yeah - they are I feel like a bit of a hand grenade with an unknown flower date! Even in the same packages, allegedly same phenos. It just for the perpetual grow is too much risk.You have to be careful picking your autos these days with the advances they have achieved compared to the first autos.
First ones they crossed with was indica & took a while before they got the THC up on that as the ruderalis is similar to hemp
Went by names like low rider because of the fast 21 day start to flower from seed & small growing plants
They had problems at first getting a stable strain crossing with Sativa plants & now the more they cross it with unstable hybrids the more they are getting messed up.
This is why some people are putting them in 12/12. They get impatient. Not all autos today will start to flower at 21 days now.
I have an auto that doesn't start to bloom for 5 -6 weeks
Maybe slowly each day add more time
But the traditional issues - smaller, lower thc levels because of the cross with the northern weed russian/siberian has been bred out a bit. The delta between a photo northern lights and an auto northern lights (just picking a classic strain at random) - differential/delta between the two types is getting closer. But the flip is when the plant decides still and its more light for less return. But that’s mine you’re not full time on it and want an easier life and the electricity is an extra $10 a month. The difference for me between 12-12 in 9 weeks of flower and 20-4 i. 9 weeks of flower? Hehehe! That's I reckon $400 USD p/m and I get lower yield. But little tent, minimal work, set and forget! For some fun and personal grow. Autos sure. That's nice and simple.
There is always a trade off whatever way you grow!
EDIT on the electricity - 8 hours more a day lights also means 8 hours more day AC on full whack and 8 hours more a day of Co2 a day. (People also rumour that Co2 has less effectiveness on Autos) so our whole grow costs like more money per gram which is what we count - BUT that’s not true for lots of people
Nick