Changing the current can change the hue (color) of the led. In some cases it’s okay in some cases it isn’t. Cinema lights for instance don’t dim with voltage because of that. Instead they have 3 separate drivers synchronized to dim in a canon. One after the other so that there is always the same number of LEDs on at all time regardless of the dimmer level.
LED lights are either all on or all off, the only way to dim a LED, is to make it blink really fast and change the time it’s on vs the time it’s off. Cheap LED lights don’t blink fast enough, so you see them flicker.
Because that search monopoly allows them to boost their other products above all others. It’s not an impartial search result anymore. There is a financial incentive to favor their own products.
Most manga were releasing on a weekly basis. That’s a lot of work with short deadlines. He probably calculated the maximum amount of time per page and times himself in order to be able to finish on time.
Look for the modpack Additive It’s based on Fabric with some great mods oriented towards speed and QOL which replace OptiFine in one package.