Yeah the microSD will die eventually even if it’s a high endurance one - but it’s fine for a small installation, I’ve been running a quality one until I really started building out the sensor network. With just switches it was fine. Now running on a mid tier usb3 ssd.

Low power sensors are only being polled every few minutes anyway. I have a dozen temp/humidity sensors and several dozen lights etc and my HA on a Pi 4 has no lag issues from it.