The safety limit of DC- Voltage in Europe is 60V with out preventive measures (DIN VDE 0105-100, ECE R-100)
This is the reason why the Logo 800 just has 14s (14*4.2=58.8V) and the best ESC manufacturers (Kontronik, YGE, Jeti, etc.) offers also only upto 14S.
For over 60V DC, it's means live-line working, the working person must be trained and well protected.
This is not allowed that anyone who is not trained to do this, because of the life danger.
It's also very difficult for the ESC and Battery manufacturers to add more preventive measures to reduce the risk. It costs money, weight and when something bad happened.
It may course some million dollars, it's to risky.