Sorry, I did not want to sound like a jerk - English is not my first language. I'm no expert, but checking the information on Toshiba's page it states:
https://www.toshiba-storage.com/trends-technology/mttf-what-hard-drive-reliability-really-means/
As a lot of people here are hobbyists (me included), even taking the lower of presented values (10,000) and dividing this by 2, results in 5000 days of promised workdays, when we start/stop HDD from Toshiba twice a day. In this case, I'll argue, that start/stop cycles are not that important if we are not doing them - for example - 20 a day. This can be set in various ways, for example, to power off an HDD that has not been used in the past 1h.
As is already stated, electricity costs are extremely high, and in a scenario when the HDD is not in use for 100-80% of the day (this is my exact scenario) it is extremely important for HexOS (in my opinion at least and TBH that would be a deal breaker for me that if I would know beforehand I'll probably not buy it - and I already did) to have a way to define terms, on which HDD can be powered down.