So it's kind of in limbo, if you want to run a rpi 5 then its a little tougher to do, but if you want to run a zero 2 w, pi3, or pi4 and run the older OS on it then it will work fine. Raspbian changed how you interface with the gpio and it needs to be updated in order to work with the latest OS releases. I have multiple of these running and they are solid if you do that. So it just depends, there is currently no features being added that I am aware of but if you look through and see all that it can do which is a bunch of stuff, you just have to decide if your ok knowing what I stated above. I look for stability over pretty much all else, I do not mind running on an older OS as long as it does what I need so I continue to use them.
Maybe this winter I will have some more time, I would like to go through the code and see if I can figure out what needs to be updated, but i was also hoping to do that last winter, lol. I believe
@Ranjib is just really busy with life currently and not sure if and when he may be able to jump back in, but the current product is solid.
There are other options out there
@robsworld78 who has kits also has his own software that you can use so that is an option also. The thing that I like the most is that its all open source, anyone could fork the repo and start updating. It's not like the corporations that just stop supporting things especially when using the cloud, at least here there are opportunities to do something in the future.