LibreOffice is slow. On a ~2010 business-class Dell laptop that still is in perfectly good physical condition, running Debian 9, with a handful of tabs in Firefox and a mosh running:
adamantoise:~ geofft$ time libreoffice --terminate_after_init
real 0m8.103s
user 0m1.696s
sys 0m0.520s
The rant here isn't about cloud vs. local, it's about performance and functionality. We had the cloud in the late 1980s, it was called dialing up to a mainframe, and it worked fine because software was designed to be fast in the presence of slow (by today's standards) connections. One of the examples of that -- library card catalogs running on amber-screen terminal -- was explicitly brought up in the rant.