A shower curtain of a very important, and well known document from your country such as the Charter of Rights and Freedoms from Canada, or Declaration of Independence from the US. If you live in a country that still recognizes the British monarch, you could also put up a photo of the king (very common in government and military buildings)

I fully agree - home assistant is the way to go, even if it’s a little more complicated.

It’s much easier to add / remove / replace hubs as needed. A few years ago I switched my main hub from Alexa to HA. Then, a month or two ago, I decided to move away from Alexa due to the speech to text recognition noticeably degrading, they removed features (I forget what the feature was, it was a while ago), and recent policy changes. Super easy to disconnect and switch to a different assistant like Siri / HomeKit.