I've only grown a handful of autos personally, and they all autoflowered. HOWEVER in my last 15 years on this site I've watched tons(probably hundreds) of people that have "autoflower" plants that don't start flowering until the photoperiod has been switched.
Harvests per year comes down to planning, not whether your plants are photos or autos. If you stage things properly you can have many harvests per year, especially if youhave multiple lights/tents/rooms. Even with just one flower room/light I used to be on a 3-week cycle with a perpetual grow, so in 52 weeks, I harvested roughly 17 times a year.
Also autos aren't usually much if any faster to finish then photo plants, so you aren't saving any time, just spending extra money on lighting them for longer hours per day. So again no extra harvests per year.
