I'm not seeing that. There was a gradual move to decentralization that peaked in the late eighties/early nineties, but then it's been gradual centralization, partially due to ubiquitous office networking (early nineties), and then due to ubiquitous Internet connectivity (mid nineties on.)
There may have been slight ripples during that time that affected the acceleration of the curve, but the broad curve itself was never interrupted.
My history would show:
1950s-1970s: Era of the highly centralized mainframe, with minis used in occasional scientific applications.
1970s-1980s: Increasing use of minicomputers, plus rise of the micro, some of which made their way into businesses. It's slightly less centralized but users are still sharing common computer resources.
1980s-late 1980s: Rise of the home/micro and PC, almost all applications local save for occasional use of Terminal emulators to access "legacy" applications on a central mainframe or minicomputer. Most new development is of decentralized, disconnected, tools.
Late 1980s-1995: Rise of the network. Client-server application development starts to take off. Development in business starts to be for partially distributed, but partially centralized, applications.
1995-2005: Rise of the Internet and associated standards. Businesses start to move all their core applications to the web, leaving a handful of Office type apps as the sole remaining decentralized stuff.
2005+: Rise of the cloud. Driven by a combination of mature web standards, the explosion of interest in non-PC devices, the increasing use and popularization of hosting services, and businesses that run data centers finding they're both hellishly expensive (yet unavoidable) and inevitably end up with huge amounts of unused capacity, there's a huge movement to move core business applications to services like AWS.
If there's a move against the grain (either towards centralization before the late 1980s, or away from centralization after 1995) I missed it.
Don't be fooled, if you have been, by the occasional post-1994 move towards more client devices, frequently out of control of IT (such as the BYOD movement), those initiatives only work because the core business applications are centralized and accessible using standard clients.