"just a hobby, won't be big and professional like gnu" which is a quote from Linus's Linux announcement on Usenet in 1991.[1] He didn't know it was going to be big at the time, making it an ironic statement after the fact, and that could also be the case for any new OS from scratch such as this one.
I don't think it was a perfect storm going on , but rather since today Linux is popular & strong , you are retracing it to it having a perfect storm and nothing can come close to it .
That being said , I still think that this wouldn't reach mass adoption "just for being an alternative to linux" and that this has to have a specific purpose
For example serenity os has a really cool old - ui and some people think its a fun os in general , out of which came the ladybird project.
Redox os is trying to write it in rust , something which can have some practical meaning in my opinion