IMO there was never a reason to blog other than because it's an activity you enjoyed doing. It's easy to think about the blogs that made it big, but that's because you're not thinking about the vast majority that never hit those numbers. It was always a challenge.

I'd say now is a good time to start a blog. Everyone's sick of the SEO-ridden, AI-ridden garbage out there today. When we return to a world where you can use search engines to find quality content, your investment will pay off.