Regardless of the chemistry, the determination of cycle number, for Li batteries is the depth of discharge. As Archimid says and I have posted limks to more than once, that cycle barrier is around 50% SOC. The gateway to deep cycle is around 40%.
The lower you go, the closer you come to a full cycle.
The other determination is heat. The largest amount of heat generated is in the last 10% of charge, or over 90%. This is because, over 50%, the battery resists charge and starts to generate heat. You need a very good cooling system to take that last 10% without impact plus a charger which is highly sensitive to charge amps and heat effect.
Current chemistry Li batteries vary from one type to another, but they all suffer from deep discharge cycling. The number of cycles varies depending on the chemistry, but the range is known. It is 500 to 2000.
Until the new Tesla formula, with many more cycles, arrives, that is the barrier.
However, the good news is that charging from 40% to 90% only incurs a part cycle. Which can change the charging from hundreds to tens of thousands.
The information is out there, no point in linking it again.