In terms of MSSPs future, I think that we're only now seeing the tip of the iceberg. The reality is that cybersecurity is becoming increasingly more complex, expensive, and essential. I've covered a number of these angles in a recent article https://silentbreach.com/blog_article.php?post=33 . The upshot is that, as you've correctly pointed out, MSSPs are just much more efficient than a typical in-house IT team.
MSPs utilize a broad range of IT expertise to resolve issues efficiently. Unlike break/fix providers, MSPs can employ the latest processes and software to proactively monitor endpoints, keeping systems up-to-date and preventing issues before they arise. Managed IT services are also available 24x7x365, allowing end users to take nights and weekends off while the MSPs do the heavy lifting on tasks and processes done after hours.
Infopulse is a digital software company based in Kyiv, Ukraine with additional offices in Israel, Germany, France, and the U.S. Since 1991, their team of more than 1,000 employees offers custom software development, web development, IT strategy consulting, mobile development and app testing services. They usually work with mid-sized clients in the information technology industry.
At the outset of enterprise computing, information technology services and management was on a break/fix basis, meaning that computer systems were only managed by an expert when they did not work, necessitating a technician to fix it. This technician may also have been the person who built and/or installed the computer system, due to the proliferation of small IT shops that specialized in this small-scale client services at the time.