well (insert stubborn emoji here) 😛, word blog comes from weblog, and microblogging could derivate from 'smaller weblog'. https://www.wikiwand.com/en/articles/Microblogging

I'd differentiate it from sharing status updates as it was done with 'finger' or even a BBS. For example, being able to reply; create new threads and sharing them on a URL is something we could expect from 'Twitter', the most popular microbloging model (citation needed)

I like to discuss it, since conversations usually are improved if we sync on what we understand for the same words.