Auto start stop is the most useless feature I've ever experienced. It's jerky and janky with fuel savings in paisa. Strains on starter and battery shortening its life. Worst part is losing cooling in hot humid weather.
Voice assistant in cars are the biggest gimmick of all time.
Another useless feature is auto emergency braking in vehicles equipped with ADAS. Should come disabled from factory; not suitable for traffic over here.
Most useful feature I've tried is ACC on highway. Set your speed, and it will do that without you needing to cancel if you see slower vehicle ahead.
Another useful underrated feature is AC vent directed at your crotch in LC100, makes me wanna drive in calmly manner 