Dev.To is great for learning from other developers through medium-to-long-form blog posts. I think I've learned more being a member of Dev over the past four or five months than over any other comparable period in my life. And it's a great community! People are welcoming and eager to help and share their experiences.
But it's not my go-to website for job searches. That would be LinkedIn, or Indeed, or (because I'm in Ireland) IrishJobs.ie. The format of these websites makes it easier to host a CV/resume-like page online and scout for relevant jobs based on location, salary, and tech stack filters.
And it's not my go-to website for having real-time conversations about current events. That's still Twitter (and I think that's the same for most people).
Unless you're WeChat, no product should try to be a Jack-of-all-trades. Do one thing and do it well. Dev.To does tech blogging really well, and may be able to expand into a developer-focused social network, but for now, it's got its limitations.
On that note, I'd love to connect with some more developers on Twitter (for fun) and LinkedIn (for business). If we're not already, connect with me and post your info below so I can follow you back! Bonus points if you want to talk about Java. Or dogs.