By the same token, "Windows mobile isn't dead" is an opinion.
It's not an opinion, it's a fact, evidenced by the fact I have one next to me right now and I've been using it all day. It received updates last night. It is a solid and reliable phone which I used yesterday, today and I will us eit tomorrow. How on earth does that translate as being "dead". People make comments like "Windows mobile is dead" based on their opinions on where they think the future of Windows mobile is headed (they never seem to give a date or a source for the information).
Either the word "dead" has been redefined or you've got your head stuck in all those clickbait articles which have been written by lazy writers since 2012.