.Mobi domains used to have a point. Now they don’t.
Last week Google posted a quick guide to moving from a subdomain for a mobile site to just using the same domain and a responsive site. The post doesn’t mention .mobi, but the same concept applies: In 2017, there’s no reason to have a separate website for mobile browsers.
.Mobi made a lot of sense when it was launched in 2006. It seemed quite prescient the following year when Apple launched the original iPhone.
But maintaining separate websites for mobile and larger browsers doesn’t make much sense anymore. Now, everyone should create a responsive website that adjusts based on the size of the browser.
Maintaining two different sites is bad for SEO and costs more money.