I'd say it's definitely worth it to write about products and solutions because it shows who you are and what you like to talk and think about. That's the case for me, where I write what I like, and if people or employers find that interesting too, then having writing is a great place to begin a conversation.

Another note on this is don't feel bad if you don't think your writing is very good. I look back on my posts from 4 years ago and it's pretty clear that I wasn't very good at writing clearly, and also my programming skills really weren't that great. I learned by doing.