Microsoft Word for Windows was by today's standard a very small program. Its size is 13.07 MB on installer disks (1.44 MB each), which you can download to check for yourself.
Microsoft Word 6.0 for Windows ran first on Windows 3.1 (released April 6, 1992) and looked nothing like Microsoft Word do today:
Internet wasn't available, so updates to software where shipped in floppy disks. But it was a very good implementation of Word processing, and we still use the same keyboard shortcuts today as we did back then.
On MS Excel, when making advanced calculations in cells, my computer took a break. I could go to the next building and grab a coffee, and when I came back, the PC still wasn't done computing.
Computing power was scarce those days, and it wasn't always pleasing being an information worker back in 1992.
As for memory consumption today(!), you'd need 150 MB to run MS Word, MS Excel and MS PowerPoint in the same time. That's a lot more than your 4 MB back in the days, but I have 16 GB available, so that's fine. What worries me though is that Google Chrome with this tab only open consumes 600 MB of RAM, telling me that it has nine ongoing processes. Time to look into that, but that's another story.