They lack 100+ fixes and various additional features? Check release date of those "alternatives"! They are so outdated and buggy, that are not even on the level to be comparable. There are and there will be no updates or any type of support.
Next. Armbian is recommended general purpose OS in 9 out of 10 cases (estimated, probably more than that) on Facebook groups and other 3rd party media, the rest goes to few other systems, which are based on Armbian or from people who have absolutely no clue what's going on.
Small crew works daily on Armbian and provide support, updates, fixes, ... Providing such service costs lots of resources, usually its premium and that's why we have a donate button. People who understand the value of our work, use it, others help with their time and others, that we all benefit.
I could write a 10 page article on this, but I am not the right person to make such comparisons in first place ...
