I haven’t previously heard about the ratgdo, but I recently did this myself with an ESP8266, relay, garage door remote, and Tasmota for the firmware. It works flawlessly with MQTT/Homeassistant. The individual components (excluding the opener) are < $10.
I love this! As a daily user of the F-91W I do on occasion wish it had a few more features, but it mostly satisfies my needs. I love the form factor and the weight. I just wish it at least had a countdown timer.
It saddens me that I don’t have many screenshots from when I was younger, even if it was just pictures of my desktop. Although I make an effort to take more screenshots these days, I made a simple tool to take screenshots on an interval. I wish I had done something like this 15 years ago.