Smart switches > smart bulbs (sometimes)
A few months back, I moved from a 3 bed to a 2 bed flat with one of my existing roommates. Instead of us sharing a bathroom, I now had the pleasure of an en-suite, and he has virtually exclusive access to the other, the entrance located in our living room (but also right next to his door).
I have since learned that doors in a bedroom are inconvenient at best, with one of the four walls being 85% door. This means you can't put furniture anywhere on that side, and if the developers of your property are as bad as mine, you'll find an arrangement vaguely resembling:
Given both doors open outwards and the hinges are positioned by the adjacent walls, that means the bathroom light is totally inaccessible once the door is open. And that is very annoying, when I have left the door open and a miscellaneous pile of garbage in the way.
Enter, smart switches
Given my bathroom is not illuminated with just one light bulb, or any standard light bulbs for that matter, smart bulbs simply don't work. I also have no idea how it'd interface with the excavator fan that turns on when the lights are on for more than 5 minutes.
I could have used these Shelly relays, which were incredibly popular online, but I decided that I didn't want to have to learn to start stripping wires, and given it's a rental, it's a little more invasive. Instead, I was able to just swap out the switch entirely.
Now, with the addition of one of the Zigbee hubs and a Google Home, I can actually turn the light on whilst I'm inside. Though, my intent was to stick some sort of remote to the tiny space between the two doors so I didn't have to reach behind it.
It is a much neater solution that I expected. I will most likely swap out the existing dimmer for my room as well at some point in the near future. This is of course, better than paying for 4 smart bulbs.