We actually went from a singer/songwriter to a duo and then a full six-piece band between 2016 to 2019! We've been putting out albums and EPs quite a bit, just been quiet in the public sphere since late 2019 since we've been working on a double-album. ;-)
Sounds like a band that releases a great album, does a bit of touring, and then breaks up because they hate each other.... and reunite a few years later and repeat the cycle. I've heard the comparison between musicians and developers made over the years, but this is a different spin on it!