I know that modern office has xlookup and other niceties, but if you're not a power user Office 97 off archive.org is like 200mb installed, works just fine on win 10 or under wine, and has the benefit of being written 28 years ago so on a modern computer everything happens imperceptibly fast. I installed the 97 suite like 2 or 3 years ago and I've never looked back.
Is there a reason to use this over LibreOffice? I had until this year a pretty old machine (~11-12 years old at time of replacement, upper midrange at time of purchase) and I never felt like it was slow -- possibly because everything was slow on that machine though and I was stuck in a forest...
I give it a pass because it's doing complicated things, it's free software and I also temper my expectations slightly because it's a Java GUI application (and I expect those to be slow).
I would certainly not expect it to be more performant than Office '97.