My advice, don't "substitute", instead replace.
There are so many delicious healthy options, and all the fake meat substitutes are garbage in comparison.
Eggs are great sources of protein already, so put just about anything on instead. BBC Good Foods is a great resource for easy meals and sandwiches with healthier ingredients if you need ideas.
I've also recently cut way back on processed meats, and honestly have really been enjoying pan fried tofu, chickpeas (seasoned and air fried are amazing), and many other protein sources enough that I've cut a lot of meat out by default.
Agreed, but it's also great that an option opened up. Gaggiuno was never FOSS, just source available, and basically built up a following before shutting source code availability down.
While Gaggimate isn't FOSS in the fullest sense, they do use a CC license (to stop commercial use) with no personal restrictions at https://github.com/jniebuhr/gaggimate
And, it's a lot cheaper to build.