I see that some 50 years later 555’s are still ticking along. I used a couple of them to flash the leds on a foam snowman I made for a Christmas display on the ship I was stationed on. The chips made it easier than building TTL timer circuits by hand.
Home Automation
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555 are pretty old school we were doing this sort of thing in the 80's.
Considering the cost of a esp32 that can do this and much much more for as many devices you can have near it not really seeing the value here before learning 80's EE.
I guess everything old becomes new again. I built one of my first DIY projects with a 555 back in the early '80s, a variable windshield wiper delay for my car. Back then you only got that feature on really expensive cars so it was way cool to have it in a '74 Volvo wagon.